I was on orthro evra for two years then went off for two years because of insurance problems. Well I just got back on orthro evra and like a silly head the husband and I didn't think about backup birth control and within days of having it on started having full blow unprotected intercourse, how likely is it that I could have gotten pregnant. I put the patch on the first day of my menstrul cycle. Also is it usual to have pregnancy like symptoms with birth control?