Low Hcg levels


Hi ladies.

I found out I was pregnant Friday, and because I had a miscarriage in November, my doctor had Hcg levels tested. I do not know what the level was on Friday, but my doctor told me they are doubling as they should, but are low. He said they were 61 or 66 (I can’t remember- I just panicked). I have a longer cycle (37 days) and I think I ovulated on the 18th or 19th. According to my LMP I am 5 weeks, but according to my usual ovulation date, I’m 4 weeks max. Is this number too low? I’m so scared of having another miscarriage.