Worried. Low levels

Beier
I am 6 weeks today. My nurse called and They moved my ultrasound date to next week, Wednesday. (Was scheduled on the 26th) She said my quant Levels are lower then she would exspect for my last period being april 23. I asked if she took into factor that i have very long cycles. (Usually 38 day cycles) She said that's why they want the ultrasound sooner to make sure all is well and determine a due date. Either means misscarriage or not as far along as they thought. I think it is just that the dr if off by 2 weeks, if she is going by a typical cycle. I feel fine. No bleeding or anything. Still worries me. Plus my a1c levels are high and indicate diabeties. :( runs in the family.