Could I be pregnant?

So this is my first post, but I was ovulating September 4th-10th and my boyfriend and I had sex during that time a good bit without a condom. This past weekend I was having cramps like I was about to get my period, but it was still over a week away and today when I peed there was light pink/brown blood on the toilet paper (gross I know) and it’s still 5 days before I am supposed to get my period. I am still having slight cramps and my boobs hurt a little bit. Could I be pregnant?