Sorry to hear about your medical condition, and how some react to it because of ignorance. JW's are imperfect and many times come accross as cruel despite their best intentions.
I remember when I was young, some in the congregation didn't want their children to associate with me because my parents were inactive.
I did have a good friend that hung in, and we pioneered many years as we grew up together.
I used to be in charge of a First Aid dept at the assemblies, and understand the issues that you faced. So many came, but I felt that they should have stayed at home. One time a older brother came to the assembly, and had breathing problems. He stayed in the first aid the whole time. The next month he had died. He gave his all, to his faith.
You will learn that these things will stop to bother you in time as you get older.
Peace