Is there a disability rights advocacy org you can call? Or free legal services? I can't tell from your job description if you have low income or not, but there are free legal services for people who've been discriminated against because of a disability.

And don't keep yourself from getting help if this has caused you to spiral. It doesn't prove anyone right about anything other than you are under extreme stress. Get some help and take care of yourself. Then, consider whether or not you can get someone to look at this from a legal perspective to see if it's discrimination.