Since you are not responding to 800 mg ibuprofen next line is  injectable analgesics with most effective being injection tramadol.but it causes Little nausea and vomiting which also need to be handled.endometriosis itself has detrimental effect on fertility.so for future you need to plan your pregnancy soon.Birth control pills keep endometriosis suppressed they do not compromise fertility.they cause cessation of mensuration which returns to normal once you stop them

Most effective route means for pain relief.You have taken ibuprofen no relief so take pain killer injection for immediate action.After taking injection donot do drink.So it is upto you what do you want.