I took Wednesday and Thursday's pill. On Thursday I took Friday pill (active) and Friday I took Saturday (active) and Saturday I took Sunday (inactive). Sunday I took Sunday Monday and Tuesday (inactive) and Wednesday I started taking my pills like normal which all was inactive and that same Wednesday I started my period. Also on January 10 I was on antibiotics for 10 days, I know antibiotics affect the birth control and I messed up on my pills on february 20-26 is when I messed up my pills. On march 11 me and my boyfriend had unprotected sex. I know it's to early to tell if I'm pregnant, but is there a possibility I could be? My period is suppose to start march 26. I've been cramping and my breast are sore where my breast connect to my breast which ian thing is due to my period because it is a week away. I am hoping I'm not pregnant, but is there any way I could be since I messed up on my pills?