Miscarriage???

So I got my period November 2 but it was a lot lighter then it normally is. Then two weeks later I started spotting. For the first two days it was really light and I didn't think much about it! Then it started getting really heavy and I've been like this for over a week now! It's not as heavy as before but I don't know why this is still happening! I had sex before I got my period and after. What could this be?