Bleeding after sex

I am getting frustrated I’ve seen 4 doctors and 0 answers . I am bleeding after sexual intercourse since I had miscarriage in March. I did have a uterine biopsy and it was positive for infection that the miscarriage caused . I had another biopsy and it was neg and all clear from a different doctor. I had 4 internals, 2 biopsies, 4 ultrasounds and nothing is showing any signs of having issues. None of the doctors will perform a pap because I am not due for another one to two years (I am going to push for it big time when I go in Friday). Has anyone had bleeding after sex and if so what was the reason . I am not in pain but I am freaking out. All I can think cervical or the miscarriage . No tumors, cyst or anything.