<<<Why do I bleed during sex? Tests came out negative & doctor claims I am normal?>>>?

This is almost certainly cervical membrane bleeding from rough sex. You two need to back down the intensity or get him a donut. I donut is a rubber item that looks like its name sake and simply fits over the base of his organ and keeps him from going into so deep as battering your cervix. The pleasures will be the same, but while you are both new to sex, he needs to learn there is a lot more to intercourse than just slamming it home, so to speak.