can i be pregnant?

so i'm kinda of scared because I was playing with my bf but I had my underwear on and then he cummed on my underwear, I have been having this cramps and nausea, is there anyway I could be pregnant? I don't think so, but I'm scared. I haven't been taking my pills for like 2 weeks because I forgot and my period is late. could it be from not taking the pill or from being pregnant? and also now i had a brownish bloody discharge