Need to calm down..

So, I ended up missing four birth control pills in June, missed two in my second week and missed two in my third week. I had sex during my placebo week when I was spotting. We had unprotected sex twice in one day and once only he ejaculated. After that, my period started back up again and was super heavy and painful. My SO and I noticed thereafter that I had missed pills because I just forgot since we had been so busy. I know it's kind of a hit and miss with missing pills and possibly getting pregnant on the withdrawal period. We then again had sex July 3rd and 4th but used a condom both times. Even though they both kept sliding down him, he would fix it and then we'd continue. He never finished either time. It has been exactly two weeks since we had unprotected sex and I took a pregnancy test and it kind of looked faint to me but my friends and SO said they didn't see anything. I'm so confused and stressing out about it. I'm in college and don't really want to have a baby right now but can accept it if I am pregnant. Has anyone ever gone through this before? We had sex quite a bit in the last two weeks and I have had irregular periods whenever I wasn't on birth control. Is testing 12 days before a period too early? I can't seem to calm down from this. I still feel like I might be. I've had tender breasts, headaches, a lot of discharge, side pain in the left ovary area and just random spurts of nausea. Would love to hear your thoughts and advice. Thanks ladies..