What Causes Severe Abdominal Pain And Vomiting During Periods?

Have excessive pain during periods.Shooting pain in the lower stomach and thighs. Cant sit or stand. Have vomitting also with uncontrollable pain. Doctor suggested Pause MF, Infern and Dexpure D. No cure. The same problem continues again. I am 28 years, 5 feet tall and weight 88 Kgs.This problem is continueing for more than 10 years.