Yep, a couple weeks before I moved. I strongly disliked where I already lived. And I knew I would be moving to a place I really liked (and an area I had lived in before). But like people said previously, it's just the unknown. It's not easy to leave the familiar... even when the familiar isn't all that great!
There's a comfort in familiarity.
But as one of the first responders said, I would definitely listen to your gut feelings. Is this cold feet, or do you have some sort of gut instinct that's trying to tell you something?
Try doing an "alternate timeline" of your life. Kind of like the "alternate 1985" from Back to the Future II. Imagine if you had no moving plans at all, and your future forecast was simply to stay in the place you are now indefinitely.
Could you handle that? My answer to that question was a big fat no. That warmed up my feet a bit. lol