Just do your best to ignore them. They are the ones with the issue, not you.
We need to see a picture of you in order to see for ourselves but if people assume that you are you should go to your doctor, and if he/she says your ok then there's no worry
I was the same way until about 5 years ago.......Ignore them....
modern day media and television people are blind to anything that they havent seen on TV and assume from what they saw
They might be worried about your health. There are people out there that don't realize they have a problem, they might just care is all.
eat well, live forever