HCG Numbers-Concern

𝐿𝒾𝓃𝒹𝓈𝒶𝓎

These have been my HCG numbers (as of today I’m 5w2d)

14,000 Monday

26,000 Wednesday

43,000 Today

They don’t seem to be quite doubling, my doctor doesn’t seem concerned but I am. Has anyone else had this?