I have had 3 miscarriages. I under went every possible fertility test possible. They found absolutely nothing wrong with me nor my husband. I am now pregnant again. My progesterone dropped during my 4th week of pregnancy and the doctor prescribed prometrium. I am currently experiencing brief but horrible cramping accompanied with some minor bleeding. I've read the prescription information pamphlet over and over, and that is apparently a side effect. But with my history...I just need to know if anyone else experienced the same while taking Prometrium but still was able to have a healthy baby.