Pain, pain go away ☹

This might be tmi, but I have severe menstrual pain. It doesn't matter how many painkillers I take or how long I lay on a heating pad while I'm on my period I'm always in pain. Eventually with the 6th pr 7th motrin the sharp pain goes away, but the underlying pain stays all day. Does anyone else deal with this? If yes, what helps u with pain management.