Hi, I had sex on Sat June 7th at night and took plan B the 8th in the morning. My last period was May28th to june 3rd (approx). I am now experience nausea for the past 2 days as well as vomiting, and I have no appetite. About 4 days after taking plan B, i started my period, or so i thought, it lasted about 2 days and dissappeared. Are these normal side effects from Plan B?