From having twins to just one baby

Has anyone found out that they were having twins and then you're only having one after all because the other baby didn't make it? My point is, I know when when having twins you're technically at an at risk pregnancy because it's a possibility to have the babies prematurely. But in my case I was gonna have twins but my other baby at 10 Weeks in the womb didn't make it so now I just have my one baby, would I be apart of having my baby prematurely as well because I WAS going to have twins or would I just end up going full term like any regular singleton pregnancy? Anyone gone through this? Im 33w1d today! 😊 my doctor Said he's healthy, and doing great, I do keep going to my anatomy ultrasounds because his umbilical cord is attached to the side of the placenta instead of the center. Would this be anything to worry about too?