Those #'s sound great.....and my HCG level at 4 wk 3 day was only 292 and at the time I was carrying triplets but now just am having twins.....so it could be but some women just have high HCG levels
Like Joy said levels can different from person to person. I had super high levels and only had one.
There's no way to know about twins unless you see them on ultrasound. Honestly those numbers sound normal!