Progesterone pills

Hello everyone! I got my BFP this past Friday and are so happy! I went to the doctor and they did some test. My progesterone level was at 10.3 and they said that is low. They have started putting me on progesterone 100 MG. Of course being my first time being pregnant, I'm a little worried. Is there any success stories with the same or close situation. I guess I'm more nervous because I also saw light pink discharge also. Any advice would be great.