First time having sex, blood!!

So I had sex for the first time today and the first time he put it in and stoped I felt something running down my leg and I went to the bathroom at his house because that’s where it’s all happening it was blood going all the way down to my ankles and I know when it’s your first time u bleed but why so much and how long before it stops cause I’ve tried to do other stuff but i stop each time cause I keep bleeding… how long before it stops?? 🤔🤔I’m annoyed but he’s not bothered by it and I’m happy I don’t have to be embarrassed.