Chance of twins?

Rachel

So my husband and I are starting to plan for baby #2 and my brain can’t get the prospect of twins out of my brain. For our first I found out that I had 2 gestational sacs but only one embryo and if I’m not mistaken I believe that is what vanishing twin is? Has anyone else had this and then gone on to have a singleton pregnancy? What are my chances of having twins or am I just being paranoid? 😅