help😪

Okay. I've been TTC for about two months now. I understand it takes time and effort to conceive but every time I have sex with my partner, I bleed for 4-5 days after? It's horrible!! Sex isn't painful, in fact I enjoy it very much. I'm just so confused as to why it's happening. For bout a week I had cramps in my abdomen, sore boobs and I was craving onions and dry bread but as soon as I could take a test, I started bleeding again. I'm so worried I won't be able to have children. Anyone else have this problem? Should I go to the doctor? Helpppp😞