Help!

Britt
So me and my boyfriend had unprotected sex ( we don't use any form of birth control ) right during the time that I was ovulating. It has now been about 2 weeks since then and I am now 2 days late with my period. I started feeling some super mild aches in my vaginal region which is normal for right before my period but still nothing. Today I began to feel "wet" and went to the bathroom only to see thick white discharge. I have been nauseated for the past week, so much the past few days that I have almost thrown up. I have also been getting headaches for the past week as well. I'm pretty sure I'm not pregnant but would like some second opinions on the matter and see if anyone else has gone through this and ended up pregnant before I take a test. Thanks!!!!