Cysts 😐

I had my annual gyno appointment today and he found a cyst on my right ovarie about the size of an egg. I go for an ultrasound on the 28th. He says it's either nothing or it could be what forms on the ovarie you conceived from early on in the pregnancy. I had the same thing on my left ovarie with my last pregnancy, but was never told how big it was. I'm so nervous, the worst things are going through my mind right now 😩