Dreams

So i have been having pregnancy symptoms but AF is supposed to be here in 3 days so i am waiting and i can barely sleep because i feel uncomfy and i move and wake up alot throught the night so anyways i had a dream that i took a pregnancy test and it came positive but then i had another dream about a pregnancy test and came negative. Why am i having these dreams, im not thinking about it but have someone else dreamed the same and got pregnant,?