Teacher with MS

Hi, I’m a teacher in England. Diagnosed in September, awaiting to start treatment. I had optic neuritis last year and recently I’ve noticed a small patch of my eyesight blurring. I got in touch with the MS Team at the hospital, they said this is likely a relapse triggered by stress or other things, stress is the only thing I can think of as I haven’t been ill. I’m just wondering what do people normally do with work when having a relapse? Can it get worse? I’m very very new to all of this so any advice would be very much appreciated x