Had sex for first time, am now worried

Giovanna
So Saturday night I tried to have intercourse but only lasted a few minutes because it hurt too bad. I knew I was going to bleed, but it hasn't stopped since that night. It's not heavy, but it's more like the end of your period when you are spotting. And today I looked at it with a mirror and the hole seems to be...enlarged? I'm not sure how else to describe it. 
Is any of this normal?