What was your levels at 5 weeks

So I had my levels rechecked 2 days ago, and my doctors said my levels were kinda on the high side for only being 5 weeks, my levels were almost 18,000. it’s still early and we only saw one heart beat. I’m nervous, my mom is a twin and so is my grandfather and great grandfather, so twins runs in my family.

What was your levels? If they were higher, did you have one baby? Thanks!