I'm with IGSBETH....Awwwww! Thats terrible! You are right to be proud of yourself - you're doing great!! Don't let other people's careless comments get you down!
Here's one of my favorites that was said to me:
"Yeah, so I've been working out and going to the gym lately. I figure, if you can do it - I can sure do it!"
Now, I think it wasn't meant to come out quite like that, but it was a "wait, what??" moment for me :)