HCG levels

Sarah • Married my best friend 11/12/13. We have 4 boys ages 8, 5, 5, and 3 (no they aren`t twins... we are a blended family).
I had my levels tested at 4w6d and they were 4659 and at 5w1d they were 6776. I was told that they are really high, and that it could possibly mean twins... this is my 7th pregnancy. I have 3 boys ages 9, 6, and 4 and have had 2 MC and 1 CP since December 2015. I'm wondering if anyone else has had levels this high this early and had only one baby? Or just what everyone's levels were at certain stages.