I am so sorry that happened to you. Being that I have a facial PWS I get those kind of comments weekly. I have learned over the years how to not let the comments get to me, or turn the persons words around on them to make them look like a fool for asking the question or making the comment.
Don't let the comments keep you from doing what you like to do in life. Those people are the ones with the problem for pointing out other peoples problems when they have their own they should address.
Hope this helps and keep your head held high.