HCG level questions

So I went to my doc to get my HCG levels checked out. Last week on Wednesday they were at an 80. She put me at 1-2 weeks pregnant 😂 I went back in to get them checked yesterday and the level was at 1,147.

She seemed confused in the phone call she gave me and the voice mail she left me this morning, and when I called back, they told me they’d have her call me again.

So I guess my question is. How is it possible to have a level THAT high if I WAS only 1-2-3 weeks?

Even when I googled it it didn’t make sense.

plz comment for me 😅