light bleeding

My boyfriend arrived home from a trip snowmobiling up north and when he returned we had sex a little while after (sorry if that's tmi). Anyway, after we had sex I went the bathroom and I had some light bleeding and after I wiped it was very light spotting. I've had mild cramping here and there throughout the pregnancy (I'm 10 weeks). I don't have cramping right now and the bleeding is basically done. Should I be worried? I still haven't seen a doctor yet.