At 8weeks the doctor did an abdominal ultrasound and couldn't find the baby. He send me to do a vaginal one in 2 days I am scared hCG level 41, 000?

Calm Down! The HCG level you give could be seen in a 6 wk pregnancy. Would be hard to see with abdominal sono. Molar pregnancies tend to have higher HCG values. Get the vaginal sono and find out for sure. If there was a problem then it is best to get it over with earlier than later. Hope things work out for you!