Bleeding during pregnancy?

Ok, so my boyfriend and I have had sex a week ago. And he came inside of me. I took a pregnancy test yesterday it said I wasn’t pregnant, but I was told to do two tests just in case. I was suppose to get my period this past Saturday. I didn’t experience anything until today, I cramp at certain points and it’s light bleeding, usually I’m a heavy flower the first 3 days. And usually my cramps get really bad. I’ve been doing a lot of research and I’m still so confused. Is there a chance that it could just be vaginal bleeding and I could be pregnant? Or just relax and wait until I stop bleeding to take another test?