Hello. I m sorry you re having problems. The most common cause of vaginal bleeding after sex is cervical friction, which is simply due to your partner s penis coming in contact with your cervical os (opening). The cervical os is normally fairly fragile, and at certain times during your cycle it becomes even more so. Many women regularly have post-coital bleeding at specific times during their cycles. Post-coital bleeding is also quite common in women who take birth control pills, which increase the fragility around the cervical os. Such bleeding isn t serious. Other possible causes of post-coital bleeding include pelvic infections, uterine fibroids, cervical polyps and cervical cancer. (If you ve had a Pap smear within the past 2 to 3 years, cervical cancer is very unlikely.) Whether or not your abortion in May is contributing to this issue cannot be determined without an examination. If your bleeding persists, or if you develop other symptoms (pelvic pain, vaginal discharge, fever, pain during intercourse, etc.), see your gynecologist. I hope that helps!