ive been on the pill since i was 15 to help get rid of period cramps. due to health concerns from my mother i was put on the lowest dosage possible. now im almost 18, and my cramps have returned. my doctor gave me a new prescription. ive been taking them for almost two weeks now and the side effects are killing me. constant migraines, nausea, and itchiness around my butthole. she said the side effects would go away in 2-3 months, but i dont know if i should bare through it or go back to my old pills. opinions?