How do you keep your calm until your first ultrasound?

Love

I live in Sweden and I won't get my first ultrasound until the last week of my first trimester. I am going berserk thinking the worst possible things! I'm very very worried about the blighted ovum thing, that I'm reading from so many posts here. I hope my tiny bean is in there, I hope everything is OK and it is just my irrational fear. This part is even worse than the Two week wait!!