So about 2 days ago my boyfriend and I had morning sex. I went back to sleep and woke up about 3 hours later and my vagina was really itchy...it was itchy for about 30 minutes then went away. Since then it's been mildly itchy but not too bad. The past 2 days though, I've been experiencing thick white discharge. There's so much that I have to change my panties... It doesn't really smell. I have no idea what could be causing this, any ideas??