I have high levels. At 7w5d it was over 150,000. At 8w2d it was over 230,000. I was hospitalized for HG because the high levels were making me so sick that I could even keep water down. They did an u/s to check for multiples or a molar pregnancy but everything looked fine (except small hematoma). Only one baby.
I really don't have any answers but I admit the high levels concern me a little bit.