Unprotected intercourse, he pulled seconds before he came, my breast are sore

So me and my boyfriend had unprotected sex, but I don't know if it really counts as going all the way. He would stick it in me, and waaaay before he would cum he would pull out and we would do more foreplay untill he came. There was only one time, where he pulled out a couple seconds before he came. I know there was no cum on me, and I'm almost positive he never came in me. We had protected sex, too. We only didn't have protected sex about three times. My last period was Feb 14, we had the unprotected sex the day after I got off my period. I'm only about 4 days late, which isn't a big deal for me. My period isn't always spot on. My boob are sore, which always happens before my period but they have been sore for 3 days now without any sign of my period. Which kinda scares me to thinking it might be for pregnancy and not my period. My back also hurts, but that's also a normal sign before my period, and it hurts even when I'm not starting my period. I haven't had any spotting, food cravings, I'm not really tired (I mean I sorta am, but I really feel like that's only because I wake up at 6 every morning for school and the time just changed so I'm not exactly sure that counts.), I haven't really had cramps, naseua, or constipation. I have had some gas and like a discharge, almost like a white and really thick and a lot, and my ribs are hurting bad every now and then. I read that the reason my ribs could be hurting is because of Anxiety. I have generalized anxiety disorder, so that could be a reason for it. But I also read ribs hurting is an early sign of pregnancy. I've had headaches, but they were like short, painful and went away quickly, so I don't if that is a symptom too. I'm really paranoid and stressed about the whole boobs being sore and not starting my period yet. I feel like me being stressed is delaying it some, too. Anyways, I just need some advice, what yall think, and comfort words!!!