Broken hymen or did he just hurt me?

This is probably a stupid question but, I had sex for the first time and was on my period, he didn’t mind nor did I. He’s big but There wasn’t any pain it didn’t feel like my hymen broke, but the next morning I woke up and sooooo much blood starting falling down my legs and on the floor and on the bed, there was literally a pool of blood but , like I said I was on my period and like any other woman I was using period products, two actually, just to be safe, so naturally I would have known if I was leaking or anything like that but I had no idea, like I stood in bed with him for like a hour and I didn’t feel blood or anything. I guess the experience kind of traumatized me lmao.