Can someone help please

So the beginning of last year I had sex for the first time but it went wrong. The first go round he had a hard time putting it in . The second time he got it in but it felt weird and he noticed after a few strokes that I was bleeding. I was bleeding for almost a hour straight with blood clots the size of a gulf ball. There was no pain but after I finished clotting I started my period. I went to the doctor and she ran some test but said she couldn’t find anything and my blood test came back normal . I want to try it again but I’m scared ... does anyone know what this is or have any advice?