Hello dear Understand your concern. It is bacterial vaginosis that cause pain after sex. As change in vaginal ph after the sex, it will aggravate the bleeding and pain It also decreased lactobacilli and vaginal dryness may be reason for pain. Other cause of pain after sex may be Cervical and endometrial dysplasia. Vaginal dryness/vulvovaginitis Endometriosis Polyp Take following advice You take following advice Tablet metronidazole Lacto bacilli orally or vaginally Hydrocortisone ointment Shower with salted warm water Wear pure cotton loose inner wear Apply aplple cider vinegar Wipe pelvic area after urination and sex Avoid sex till you get better If not resolves contact the gynecologist Pelvic examination Do microscopy and culture , swab taken from urethre or vaginal discharge PCR, NAAT and ELISA for STDs also Hope this may help you Best regards Dr. Sagar