I'm on my fourth pack. The first month of taking Yasmin i had no pelvic cramps. However, i started getting cramps after every 7 days of starting my period until i get my next period. The cramps get worse and more intense as i get closer the my period. I don't know if it's the birth control or something else. The cramp/pain is in my lower abdomen above my pubic bone. I'm not sexually active and I'm negative for UTI. What could it be?