Progesterone levels

Hi! I’m 41 and 6wks- I had blood tests done and my doctor said that my progesterone levels dipped so she prescribed supplements. I’ve gone down a rabbit hole on the internet and am worried that this means I may have a miscarriage. I had a miscarriage last year around 10 wks- I was wondering if anyone else had this or had to take the supplements and everything turn out ok.