Hi, my boyfriend and We had un protective sex, of course he did all his business in me. About later in the evening the next day. We bought plan b, I took it, I got really sick like in the first hour after taking it. I haven t felt right, I can t eat, I have a headache, I m very moody. The night we had sex was the last day of my period. It was very light that night and then it was gone eventually