first ultrasound tomorrow!

So as the title says tomorrow at 7 weeks 6 days is my first ultrasound. I'm so nervous that it won't go well as I've had a previous miscarriage. Anyone else in the same boat? I have had lots of nausea and breast soreness. No bleeding or cramping, except when I sneeze. But I had low progesterone and I am on a supplement for it. I'm just worried though. Any words of encouragement would be great.