Offered tue job but then declined due to having MS

I was diagnosed with relapse and remitting MS 4 years ago and been receiving tysbri treatment for almost 2 and half years. The treatment has stabilised my condition (as confirmed by my Neurologist) I decided to have a career change and apply As an ambulance technician. Passed the fitness test ( which is tough hahaha) had the interview and was offered the job!!! (Subject to Occupation health assessment & reference) signed the contract and returned it. Had my OHA. Which I knew would tough… To find out that the OH consultant has stated in writing her view " With regards to her neurological condition she would not be fit for professional driving" … I am so disillusioned with not being labeled… Can’t find anywhere that’s states if you have MS you can’t be a “professional driver”. Feeling gutted!!