Should I be worried about the severity of my period cramps? They are so bad to where only a vicodin can control it. The pain wraps around to my back.

Maybe, see your Dr. Depending on your age and the number of chilren you have, there could be a number of causes. A few causes are: primary dysmenorrhea(painful periods) can often be treated with birth control pills. Endometriosis can be treated with numerous drugs including hormones or a drug called luron. Adenomyosis usually treated with hysterectomy fibroids can be treated with removal, lupron, (leuprolide) or hysterectomyy.
Seek help. This would be a good time to see your md for an updated evaluation, and advice regarding medication.