So, I took the Plan B One Step pill the day after my SO and I had sex.. About 1 1/2 hours later, I threw up. I took it on an empty stomach, but I have been sick the past couple of days. I couldn't get my birth control until a day after I was suppose to take my first pill of the month, so of course I missed that first day. We had sex the next day and I took the Plan B pill just to be safe. Could I be pregnant? Did the pill have enough time even on an empty stomach? Thanks in advance!