I took a plan b pill a little over a month ago after having sex the day before my period started. I got my period 3 days later than when expected. It was heavy and lasted 4 days, so I was thrilled about that. However I literally feel pregnant! What is going on?! Is this normal? Should it last this long? Headaches. Cramps. Sick to stomach. Ugh. Researching this stuff only makes your brain crazier. Anyone have Side effects that last thing long?