For sure a lot of others have had the same issues as you. Actually since mid-year, so you should have done your research.

If you reset your password recently, your limit was hit, or just having a really large withdrawal could have all triggered this. Did you withdraw another coin from the ones that you did previously that went through without delays? If yes, and you want your funds out of poloniex quickly then i would suggest just cancelling the withdrawal, trade your withdrawal coin to the other coin, and then withdraw that.

But otherwise you can definitely keep waiting. But i recommend staying clear of poloniex's path. There is a reason why they're not the top crypto exchange anymore.