Liver Cyst?

Has anyone ever had a liver Cyst? What happened with it? A year ago, my appendix burst and I had to have surgery, and they found a small cyst on my liver by CT just by chance. Complete accidental find. Well I had a follow up with a specialist, and he said he wasn't worried about it at all, just to come in a few months to look and see if it is growing, etc. well I didn't have insurance then, but I got insurance this year, but I'm also pregnant. So two weeks ago, he decided to do an ultrasound on my liver, Bc I can't get a CT while pregnant, and they couldn't see it or find it. So they want an MRI, but I wanted to wait until after the baby is born, I'm 23 weeks. Has anyone ever had a liver Cyst and it be nothing?