Low progesterone & pregnancy

Miranda

My first progesterone at 4w2d was 12.3 and then I was put on Crinone 8% one a day. Two days later it went up to 13.2 so then I was put on Crinone twice a day. After 48 hours the progesterone only went up to 13.5 and that was at 5w1d. So then they added a prometrium pill at night. My nurse told me that they won’t be checking anymore progesterone levels and I am very anxious that I will miscarry. I’ve had one blighted ovum in the past and one chemical. I did have an ultrasound this week that showed gest sac and yolk sac but next u/s isn’t until next Friday and I’m so nervous. Wondering if anyone else has had similar situation?