can't wait to know for sure...

I'm 33 weeks 3 days & have consistently measured 2 weeks ahead & never did with my other kids. My original due date was 12/18 by my lmp & it's 1/12 now. Now doctor is starting to consider my baby is either big or due earlier. I had 6 week cycles before getting pregnant. I get to have another growth scan tomorrow & will know Tuesday when this baby will be coming. Have been counting on 38 weeks bcuz I'm diabetic & now doctor is considering making it earlier...can't wait to know when this guy is coming!!!! Anybody else having such problems knowing when there baby is due still this far along??