Low Progesterone

I had my first pregnancy and miscarriage at the end of October. I have been going every week to check my hcg levels, till they go to zero. They finally have and we are going to do more testing. I did find that my progesterone level was low. But thyroid and all else was normal. I started my period Saturday so we are going to do more testing 22 days after my cycle day 1. He told us it was up to us if we wanted to try again but he said he didn’t see anything wrong with trying again. I am just wandering if anyone has any way to boost the progesterone levels? He isn’t worried about it because he said it was a little low. He is going to do more about after my results come back from my other round of testing. But I thought that if anyone has had any luck with using something naturally to boost their progesterone that would be great!