Any at home relief for endo pain??

I am in excruciating pain, the worst I think my period has ever been. Just sobbed in my girlfriends bed for about half an hour. I’ve taken the most amount of pain killer I possibly can without having adverse side effects, it’s currently 2am. Are there ANY at home ways to relive this level of pain. I’m so close to crawling to the local hospital and asking for some codeine because this is actually unbearable. My tummy is burnt from my hot water bottle. Pls suggest literally ANYTHING that might help.