Scared

I had sex on the 24th of June and my last period was on the 3rd of June and it lasted about a week. When me and this guy had sex I was pretty drunk but I wasn't really worried about it until now I haven't gotten my period and I'm so stressed because I don't remember if we used a condom. He said he always uses one and to give it a couple days but I'm still so scared and I just can't think straight. Someone tell me what they thing. Also my right boob hurts I've been eating a lot lately I'm breaking out just a little on my fire head and I've had thick white discharge like twice in a week. what do you guys think??