I had my IUD out at the beginning on March. I've had my period twice since and both times it's been incredibly painful and very heavy bleeding. I had the IUD placed 3 months after I had my son and only had it in for 5 months before deciding we wanted to start trying to get pregnant again. The days after sex during my fertile time I have horrible cramping to the point where I have to lay down. Is this normal? Should I be worried?