Why is it when i get my period i get such unbearable cramps n pain i can barly walk why? im stuck in bed 3 days out of 7

It happens. Some women are much more sensitive to the chemicals released as the menses occurs. Some improve with meds like Ibuprofen that blocks some of the process. Cases like yours' may benefit from the pill, which was originally developed for menstrual disorders decades ago, the birth control was a side effect that became their major use. Talk with your doc. This can be helped.

Severe menstrual pain is usually caused by endometriosis, which can be modified by taking oral bcp's, which stops ovarian production/withdrawal cycle and will help preserve fertility. See your GYN physician for guidance.