Hello dear I understand your concern Heavy menstrual bleeding with pain could be due to endometriosis, pelvic inflammatory disorder, fibroid, hormonal imbalance. I would suggest to consult your gynecologist and undergo examination, reproductive hormone analysis, USG scan to confirm cause. If pain is not tolerable then take tramadol injection You can take tablet meftal spas for pain three times per day after food Other specific treatment depend on cause of problem Prentral or oral antibiotic like ceftriaxone and docycycline will help you Hope this may help you Contact further if follow up needed Best regards Dr. Sagar