Feeling frustrated/uncomfortable/upset over comments

I'm so sick and tired of comments from people. I am 24. I've been using a cane for 4 ish years cause it relieves pressure on my knees and hips. And I'm sick of how often people feel like commenting about it.

I am a master's student in agriculture. And I constantly get questions from profs about why I'm not better yet, or what's wrong with me, or why I'm in agriculture doing physical labour. It's annoying but it's just been getting to me recently.

But today, today I was at a farmer's market with my partner. They wanted to look at pies at a hutterite booth, who also sells meat. And they have their kids run the till and talk customers into buying stuff. This boy, he's maybe 10-12, as we walk up he says "if you eat some more meat you won't need that cane". Laugh it off cause whatever it happens.

And he just makes three or four comments before I can leave and it's just so. I know I'm young, I know I use a cane and that isn't common for someone my age. But it's just... I don't know I wanna cry cause I'm just so tired of this.

Better yet there was a woman in there at the same time using a wheelchair that he didn't make comments to, so he obviously knew not to make comments to her