First Appointment

So my first appointment is tomorrow at 2:30 and I'm slightly a lot freaking out!! They said they were going to do an ultrasound and I'm so nervous that something will be wrong. I want to buy more hpts and make sure I'm really still pregnant lol. I've already taken 4 and they were all positive. You can't fool that many right?? Ugh I just want this to be done with already!!!!