girls, hCG 4375, but the ultrasound shows 2 weeks. What week does an h…

girls, hCG 4375, but the ultrasound shows 2 weeks. What week does an hCG level like that correspond to? My last period started on April 27. My cycles are usually long; I'm already 2 weeks late. I don't know what to think — the sonographer scared me a little, the ultrasound gestational age doesn't match the one based on my period. Has anyone had something similar? Should I be worried? Could I have ovulated late?