Pregnant after miscarriage - Progesterone

Hello! I found out I am pregnant, we had a miscarriage last year and went back in February for an IUI and got pregnant on the first try.

I am quite anxious, we went in for our 6 week ultrasound and we were very lucky and saw and heard a heartbeat (our pregnancy last year we did not see a heartbeat and I had a “missed miscarriage”)

My worry now is my progesterone dropped a little bit and looking for any advice on how can increase my progesterone naturally? I am also taking a vaginal suppository from my fertility doctor. Just a little nervous because I know you need progesterone to keep a pregnancy.

I am overweight unfortunately so I am trying to eat healthy and do some light walking.