About a month ago my boyfriend and I had sex, and at the time I hadn't been on track with my BC pills for about a week. Needless to say, we thought we were all right so he "came" inside of me. I got my period (at least I think it is) this month around the time I was suppose to, but this month was different than the rest. Instead of my period starting light, it started that red-brown color (what it usually is towards the end of a period). I started Wednesday, it is now Friday. I woke up this morning, took a shower, and a few hours later I had to go pee. I went to change my pad and what was on it was about an inch and a half of pinkish-red blood. Not to mention, I've been super tired for the past couple weeks. I go to sleep around 10-12 at night and wake up around 3-4 the next day. I had a bad break out on my forehead and chin for about 2-3 weeks and I haven't broken out that bad for several months because of the cream my dermatologist prescribed to me. I've been really itchy as well (idk of that's really something to worry about though), and my back hurts. Basically, I want to know if these could be signs of pregnancy.

-I have also been having headaches lately.