High HCG, twins?

Ke

So we FET one embryo but my HCG numbers have been above “normal”

9dp5dt- 400

11dp5dt- 942

20dp5dt (5wks4days)- 25,626

Had first scan today and they didn’t mention seeing two, just confirmed they saw the gestational and yolk sac. I know there is a chance of embryo splitting. Anyone else have such high hcg at this rage and it be a singleton ?