I get extreme period pains that causes me to be bed ridden and puking. i've been given 6 different pills,they don't work. after my period i get a rash?

The 3 P's: Painful periods resulting in "puking" are 3 P's that dictate a GYN MD visit to search for causes. I am not sure what the 6 different pills given to you were, but clearly they did not work. Endometriosis or a partially blocked(stenosis) cervix are prime suspects. At age 16, you may be missing a lot of school for this reason, so have your Mom or Guardian get you to a GYN MD's office for evaluation.