Why am I so nervous??

I've had three positive at home tests. So after a bunch of aggravation I went and got my blood work done. They were supposed to do some special test to see how far along I am. When they called, they said the dr wanted to schedule and ultrasound for next week. Should I be worried? They said my level was 6000, but it was to close of a number to tell how far along I am. What do y'all think?