What is up with my period/body?

Sounds to me like clic symptoms of endometriosis. You can't detect it by the test your doctors have done--it can only be diagnosed surgically via laparoscopy. I'm disgusted that none of your docs have suggested this. You should do some research to find a doc in your area who specializes in endo. Also join an endo support group on yahoogroups to get some advice.