Gut feeling on miscarriage?

My first pregnancy ended in a miscarriage. Didn’t made it past 6 weeks, couldn’t see the sac during appointment, multiple bleeding eps. Finally got pregnant again after a year, the dr recommended me to take progesterone. It’s been 4 days now, I’m feeling extra tired lately and idky but I keep on having this anxiety, waking up thinking I’m no longer pregnant. I’ve heard the heartbeat, see the sac in the ultrasound. progesterone wouldn’t cause any miscarriage will it?