Struggling to Get Disability Accommodation at Work

my job recently said that even tho I've been using a wheelchair at work for over a month and a half all of a sudden i need to get approval for that accomodation and they're not letting me work until i get documentation from a dr saying that i do in fact need it and I've spent the last 2 weeks having 3 different Drs tell me they can't do it and sending me on circles and I'm seeing another Dr today and really hoping they can do it because i can't afford to keep seeing Drs especially if i can't work and i can't afford to lose this job and I'm so burned out I'm so tired of all of this i could barely get myself to take a shower this morning but if i don't see this Dr today I'm not gonna be able to get in with them until January