I had unprotected sex after which i took a morning after drug immediately. A few days later, i had a boil and had to start taking antibiotics called ampiclux. My cycle has been a bit irregular recently but my last period came on the 29th - 3rd of Dec. So i was expecting the next period to start on the 29th of Dec, but it has not come. I have been feeling bloated, feverish, have tender nipples and some slight cramping.