opinions/suggestions please (no rude comments)

Okay so recently my boyfriend and I have been having sex a lot. I've already had my period and I take birth control, but I haven't been taking my birth control regularly at the same time or I've missed a couple days, I've actually missed 3-4 days before and we had sex. I know I have no fertile days because it changes. But recently I've noticed my boobs hurting a lot and my nipples have been sensitive and darken. I also have a white mucus discharge, more than usual. My friend also said it looks like I've gained a lot of weight but I thought it was because I've been eating more and I'm a freshman in college (freshman 15). Am I over exaggerating or should I possibly test soon ?