I got my period on the 19 of November and I was completely done it by November 26th, which to say I had sex that same night. Two days ago I've been having cramps like I was getting my period which I thought was ridiculous and impossible since I just got over it. But needless to say yesterday I went to bathroom and realized I had like dark brown discharge on my underwear. I put in a tampon, and then later that night I started bleeding. It's not a heavy bleeding, but it's not a light one either. I don't think I could be pregnant but is it a possibility? Or should I go and consult my doctor and get checked on that it could possibly be more of a dangerous health issue?