So I am on birth control and have been for several months but I contracted mono about a month ago so my doctor prescribed steroids. My boyfriend and I had sex without a condom twice, 3 days before I was supposed to start my period, but also used the pullout method. I read that steroids have the possibility of messing with birth control pills so just to be safe I took a plan b pill within 24 hours of the unprotected sex. Now my period is late by 4 days. What are the chances of pregnancy? Please help I'm so scared, I can't have a baby right now.