freaking out

I'm really starting to worry about having twins. I feel like so much more can go wrong during this pregnancy and then I get really, really scared at the thought of two newborns at the same time. No one I know has twins so I feel like I don't have anyone to talk to. Everyone keeps telling me "I'm jealous, I wanted twins!" but I'm a high risk pregnancy. I feel robbed of the birth experience and parenting experience I thought I was getting. I don't want to sound ungrateful I'm just scared out of my mind.