Hcg levels

Melinda • Had 4 miscarriages in 2015 and had our rainbow baby December 2016
I went last Tuesday (I was a little over 4 weeks) and they checked my hcg levels. Dr told me today they were 161 and so she had me do it again today to make sure they're doubling. She seemed fine with it. What were everyone else's at 4 weeks?