Alright, so I had unprotected sex on the 11th, and my ovulation is on the 13th. My period starts on the 29th, and I'm been having cramps since ovulation to now. I felt something coming out, so I check my underwear, and there was blood, but it was brown. I went into the bathroom and put a tampon in. I waited a bit and took it out to see what was on the tampon, which happened to be brown with a bit of fresh red blood, as if I were ending my period. I'm extremely confused. It's the 28th, so if it is my period, it came a day early, but it's not anything like my normal periods. It's different, because it's mostly brown. Usually, I have a HEAVY red blood flow for my period, and it comes out all at once, and stays like that for about five days. Now, I just have some red blood, most brown, not heavy, and what is either extremely horrible cramps, or a stiff tampon, because there's not enough blood to absorb (making me miserable as I'm sitting in the school library right now). What do you think it is?