Here is a snip of a very good article on this very topic. I have also listed the full web page address at the end of it. Hope this helps. We can't have you awake at 4am every morning!! LOL.
"In Jeremiah 30, we find prophecies that describe the horrors of the holocaust, and the subsequent restoration of the Jewish people to their own land that allows them to be free from oppression in foreign lands. God begins with one of His frequent declarations regarding the restoration of Israel to the land that was promised "'The days are coming,' declares the LORD, 'when I will bring my people Israel and Judah back from captivity and restore them to the land I gave their forefathers to possess,' says the LORD." .(Jeremiah 30:3 NIV)
That is a straightforward statement, easy to comprehend. We understand it to be speaking of the founding of the modern state of Israel in 1948. But the next verse conveys an abrupt change in tone, and may seem to not fit very well at first. However, now that we have the perspective of understanding the circumstances that surrounded the founding of Israel, we know to what it is referring.
"This is what the LORD says: "'Cries of fear are heard-- terror, not peace. Ask and see: Can a man bear children? Then why do I see every strong man with his hands on his stomach like a woman in labor, every face turned deathly pale? How awful that day will be! None will be like it. It will be a time of trouble for Jacob, but he will be saved out of it." (Jeremiah 30:5-7 NIV)
When I read this, the picture it evokes is the haunting videos I've seen about the Holocaust. The pictures from the liberated death camps showed "every strong man" looking like a human skeleton, with every face turned deathly pale. Could a modern reporter have penned a more apt description than Jeremiah did? Certainly it was an awful day for Jacob. Certainly nothing else could be compared to it. The Holocaust was an incomparable time of trouble for Jacob, and though millions perished, the Jewish people as a whole were saved out of it, and their new nation was founded just a few years later.
Therefore, in this passage, we see juxtaposed allusions to both the Nazi Holocaust in 1939-1945, and the birth of the nation of Israel in 1948. However, many Bible commentators wish to incorrectly assign this phrase "time of Jacob's trouble" to the future Day of the Lord, even though there is nothing definitive that ties this to a future time period. Yet there is plenty that ties this passage in Jeremiah to the events of the 1940s.
The prophecy in Jeremiah 30 this tells us that at some point in history after Jeremiah penned these words, a time of incomparable terror was going to come upon the children of Israel. That period could have happened a hundred years after he wrote it or three thousand years after he wrote it. Certainly there is nothing to buttress the belief that it would be part of the final, final days of history.
Of course, even the phrase "the last days" as used in the Bible is often a difficult period to precisely pin down. "The last days" could, and probably does, refer to the period beginning with the first return of Jewish exiles to their ancient homeland in the late 1800s; or it could refer to the period of time beginning with Britain's liberating God's land from over a millennium of Muslim rule. It could have "started" with the rebirth of Israel in '48, or, if we tie it to Yeshua's words about Jerusalem being trodden on until the end of the times of the gentiles, it could have begun in 1967, and so on.
So verse 7 on its own simply tells us that at some point after it was written Israel would experience a time of unsurpassed suffering, and would be saved out of it. Verse 8 gives us a clue as to the period: "' In that day,' declares the LORD Almighty, 'I will break the yoke off their necks and will tear off their bonds; no longer will foreigners enslave them." (Jeremiah 30:8 NIV)
Here we read that, after the period of "Jacob's trouble" God Himself will liberate Israel out from it and from among those who have caused it. "Jacob's trouble" will thus have been Israel's suffering at the hands of oppressors (as opposed to what some teach as Israel experiencing the end of days judgmental outpouring of the wrath of God). The end of "Jacob's trouble" will thus also have marked the end of the people of Israel's being under the heels of the gentiles.
"Instead, they will serve the LORD their God and David their king, whom I will raise up for them." (Jeremiah 30:9 NIV) Instead of being enslaved to gentiles, the people of Israel will serve YHWH their God and the restored King David - whom we know to be the Son of David, Jesus, their Messiah. This restoration to the land just described by Jeremiah will culminate in the reign of Jesus. Note that it does not say that immediately after they come out from "Jacob's trouble" they will be restored in their relationship with their God and His Anointed One, only that they will do so at some point after being saved out of that awful suffering. It is very common in Bible prophecy for us to see descriptions of the reign of Messiah in the same breath as descriptions of events that have already been fulfilled in the last one hundred years. The prophets saw the "last days" as a broad period of time that began with the restoration to the land and ended with the triumphant reign of the Messiah."
web page for further reading:
http://www.trumpetsounds.com/howawful.html