Progesterone dropping!!

I’m very thankful that my doctor started seeing me as soon as I got a positive pregnancy test because at five weeks he’s already noticed that my progesterone levels are dropping. Starting the suppositories tonight. Hoping for the best! Had a miscarriage one and a half years ago and the blood work showed my progesterone levels were really low so maybe that’s what caused it. That doctor never prescribed anything. Hoping this will prevent another miscarriage! Anyone else been through this?