No period, never been a day late.

I recently let my boyfriend come inside me- twice. He had never done it before. This was about a week and a half ago the first time, and a couple days ago the second. I am on my 2nd day of placebo pills of my birth control that I take religiously, but I have not gotten it. I have had thick, white discharge, no spotting, headaches, and been crazy emotional. Any ideas-please tell me I couldn't be pregnant...Anyone have an experience just like this and be alright? Anything helps!!