Monday night I decided to drink for the first time and it went very badly. I took my pill at 11 PM (usual time) but threw up an hour after. i took another pill just in case and threw that pill an hour after later. I decided to wait until the morning and took my pill at 8 AM, no vomiting and took my Tuesday pill at its usual time. I've been on birth control for 3 months so far, Im currently on my 4th month and it's my last week before the placebo pills. I'm feeling cramping on my left side (from my left ovary) and I'm extremely worried. How likely is it for an egg to release? I had unprotected sex right before taking my 11PM pill on Monday night before vomiting. Should I take Plan B?