I've had a few myself! I've also had reoccurring dreams that were set in the past. One is of a country fair in the summertime. There were colorful tents and women all dressed up in colorful dresses and men dressed in linen suits with straw hats. The other was one I had fairly often (not so much anymore), I'm dressed in a pinstripe suit and walk down a small flight of stairs and go into the same tobacco shop and buy three cigars. So strange. If some of the theories are correct, a version of us exists in every single point in time simultaneously (past, present, and future) and maybe these timelines get blurred during our dream state?