I'm freaking out!

I'm so worried. I think I'm going nuts. I'm on birth control I've been on it for almost three months. On Sunday June 7th my boyfriend and I had unprotected sex he didn't finish inside of me. I've noticed my boobs getting bigger but they don't hurt which I know that happens from birth control and I feel like they look more green and a lot of veins. I think it's just me driving myself crazy because I've never really looked at my boobs like that. I do get cramps here and there which happens before I get my period. I'm supposed to get it on Monday.  I take my pill everyday at the same time. I took a test yesterday first thing in the morning and it said negative. I also had a little discharge. Should I be worried????