HCG results

Ca

I just got my blood results this week. I couldn't understand my doctor. She said I'm 4 weeks which I am by my dates. But she said my levels are....said like this....two 0 or 2.0 then when I goggle that it doesn't add up? 2 is low? But she said all is good? Doesn't that convert to another number? Cause when I look at the net it all different??