I am 45 years old, have a prolapsed uterus, a very thick wall and fibroids, my doctor had told me that it will take a miracle for me to get pregnant at a previous visit. I had unprotected sex about a week after my period (my periods are irregular). I took a generic Plan B (levonorgestrel) about 30 hours after having sex. It's been 8 days and I'm still feeling cramps, a little bit of nausea, no spotting whatsoever, just bad stomach aches. Is it normal to have such long lasting side effects?