I took a plan b pill on the 15th of this month because the condom slipped. I haven’t experienced any side effects other than think clear discharge, and very slight bloody discharge sometimes. (Maybe due to ovulation). I haven’t got my period yet. Anyways the past few day my lower back has started to hurt. I’ve been on prednisone for eczema and I didn’t know if the steroids caused back pain or if plan b was affecting me in this way?