First visit to the gynae.

Hi everyone. Today was probably the most nervous day of my being. Having suffered one miscarriage where the dr couldn’t find the heartbeat. So I had good reason to be worried. Nevertheless. My gynae was very thorough and gentle. We had to do an internal scan as she couldn’t see a lot. We found a nice powerful heartbeat she was happy with. Baby is measuring at 7 weeks and 2 days. I thought I was 8 weeks and 5 days guess I was a bit off. She prescribed me some progesterone that has me a lil concerned. Anyone else had this??? Any advise.