I wish I could help. I don't know what the good levels of progesterone are during the first weeks of pregnancy. It's too bad your doctor didn't go into more detail with you. I hope someone is able to give you some answers. Good luck!
ETA: I found this on a website just now:
Guideline to Progesterone levels during pregnancy:
• 1-28 ng/ml Mid Luteal Phase (Average is over 10 for un-medicated cycles and over 15 with medication use)
• 9-47 ng/ml First trimester
• 17-146 ng/ml Second Trimester
• 49-300 ng/ml Third Trimester
It seems that it is a HUGE range so unfortunately, I don't think it gives specific answers except that your levels were within that range. Here is the site where I got that info:
Concerns Regarding Early Fetal Development
I hope this helps!