Seasonique?

Hi. I'm 14 years old and I just took my first Seasonique birth control pill yesterday. I was fine yesterday [I took the pill at 5 P.M.] but today I have a sharp pain in my lower right abdomen. I don't know if this is a side effect of the pill or something else. My stepmom told me to expect headaches and stomach aches during the first two weeks, but this doesn't feel like a stomach ache. Maybe i'm just paranoid. Someone help?