Ultrasound nerves

I really struggle with anxiety and although I’ve been so exited for my first scan this week (12 weeks) I can’t help but feel terrified, it’s felt like this last week or so. It doesn’t make sense but I’m so worried something will go wrong or they won’t find a heart beat. It’s got to the point I’m starting to dread it. I’ve had no problems so far with the pregnancy, there’s been no bleeding or cramping etc. My boobs still hurt and the fatigue is there, the nausea has eased slightly but is still there. Did anyone else feel this way? And was everything okay? This is my first pregnancy and I’m finding hard to get past all the worry 😕