Called an OB today ...

Kel
And talked to a nurse. I explained to her that I recently found out that I'm pregnant and have had 3 CP's in a year, one last month. I explained my concerns and she said she'd talk to a doctor and get back to me. 
​She called back with a prescription for Progesterone 200mg twice a day. And an appt for 6 week ultrasound. 
​I googled progesterone but was wondering if anyone had any personal experience?? What makes me question it is...the doctor didn't even test me. It was just over the phone. What if that's not the problem??