question: Hello, im 17 & i started using the birth control patch Ortho Evra to regulate my irregular period. I started yesterday & ive been on it for two days now & i have been feeling nauseous and with strong back pain that i cant stand or sit for a long period of time. Is this normal to have strong back pain from this birth control? I havent had my period in 2 months so my doctor proscribed hormonal birth control to help my system i hope i can have a regular period soon. Any thoughts if this is normal??