HCG high?


So I went in last Thursday to confirm pregnancy after home test. They did blood test to confirm and hcg was 1653 at 3 weeks 6 days. went back yesterday at 4 weeks 4 days and hcg was 13226. they thought I was further along but ultrasound barely showed gestational sac so i know the dates are correct. i go back in for dating US Monday. Seems kinda high.