Welcome DA,
Sorry this has happened to you, but you've found a great home here full of caring people and invaluable information! Search, read and learn!
Hopefully your job will keep you on in some restricted capacity. Teaching? But if this evil monster forces you to stop working, it will be ok. We aren't defined by our jobs, but how we care for each other. Get a w/c attorney sooner rather than later. Others here are far more experienced with w/c and will be able to help you.
Weight gain is a no-no. You may want to ask your Dr about changing your medication to something different. More weight is more compression on nerves.
Best of luck to you on your journey,
Anne