Low hcg

Andrea.

Can someone help ease my mind. I found out last week before my missed period I was pregnant my ob got me in the next day for blood work was 36 that was. Friday then Monday again was 126 then wed was 360. My first pregnancy was ectopic with tube removed 5 months later was miscarriage. I am really upset as to why the numbers are so low so many people are in the thousands. Can anyone shed some light on this