Question about progesterone

Taylor

I was shopping at the grocery store in my town that has a pharmacy inside. I was buying prenatals and decided to ask if they sold progesterone tablets and the woman behind the counter said she does, 30 100 mlg tablets. I had a miscarriage last year at 9 weeks and I believe that was the root of the issue. It was never confirmed because I was never seen until after my miscarriage had happened. Should I buy them and start taking them? I am 10 DPO, or should I contact my ob and ask about it?