Low hcg levels...HELP!

So I had a trigger shot with timed intercourse and according to them and my blood tests my last HCG level was 36? And I’m about 3-4 weeks ish pregnant? Has anyone had numbers that low? I have another blood test today but I’m just so so scared ☹️

The numbers are definitely rising but still low numbers...my last one before 36 was 16...does anyone know why they start out so low? Has anyone had them so low but still had a healthy pregnancy and baby?

Maybe I’m not as far as they think I am??

My levels so far:

9.6

16

36