first ultrasound is tomorrow and I'm nervous

So I'm a new mommy, I'm 8 weeks and a few days, for some reason I'm excited but super nervous that when I get my first ultra sound tomorrow there will be no heart beat. Maybe I worry too much but is it normal to be nervous like this too? I always try to think of the possibilities mainly because I get my hopes up too easily and my heart broken. I lately haven't been having any nausea for a week and didn't know if that was normal. I cramp here and there which I've been told is normal. No bleeding no spoting. Need some advice to calm my nerves! Help?