TMI! Very Sore nipples, very veiny boobs

Holly • Got my BFP 08/27/16!!! ❤️ Had my baby girl May 2nd 2017!

TMI!!!! The past 2 weeks my nipple have been verrrrry sore, so sore I can't wear a bra because it hurts to much.  My boobs have become very veiny. And No sign of AF..    I've took three pregnancy test and all have been negative.   Please help have no idea what's going on.