My OB office called and said my blood work Came back and my progesterone levels were just a little low. They are putting me on progesterone pills to take during my first trimester. I have heard that low progesterone can cause miscarriage. I’m really nervous about this pregnancy because I found out that three weeks pregnant now I’m six weeks. At my first appointment they did an ultrasound and they said it was too early to see the baby they saw a Healthy sack and yolk. I haven’t really had any symptoms and I’m really nervous of having a miscarriage. Has anyone ever had to take progesterone pills in the first trimester.? Are there any side effects? Also this morning I wiped and saw brown discharge is this normal? My husband and I had sex the other day could that be why