Bleeding after sex

Sooo I’ve had sex 3 times and I bled after each time. I know bleeding is normal after the first time, but it kept happening. The second time I bled quite a lot and for two days but I thought it was just because of how rough the sex was. The third time, I bled like a day later and it wasn’t a lot but it was a little bit either– medium– for a lack of words. I tried doing research to figure out what can be wrong and I came across some STD’s that can cause bleeding. Thing is though, I don’t experience anything else and I don’t have a rash or foul smell or anything out of the ordinary. Everything seems fine and is fine until I have sex. I do plan on seeing a gynecologist soon but I just want to know what you girls think.