Hi,
Welcome to the forum. The symptoms are suggesive of post coital bleeding. Commonest causes for post coital bleeding( bleeding after sex) include pathology like dysplasia, sexually transmitted infections (chlamydia or gonorrhea), endometriosis or polyps. The abdominal pain can be due to any of them.
To confirm the diagnosis, you need to get a repeat PAP Smear done from a gynecologist. You also need to get a swab sample done for sexually transmitted infections.
I sincerely hope that helps. Take care.