Phew that was a mouthful! I can sense your urgency.
I am sorry you have MS- my husband was diagnosed earlier this year- but is doing well on his meds- I assume you are on Copaxone or Avonex?
There is an MS diet that you can follow- by Dr. Swank. It might help- they strongly discourage red meat btw.
As for you- I suggest small changes since you seem overwhelmed at the moment. You have lost 70 lbs so far (congratulations) and now you are stalled- do you exercise? Patients with MS are encouraged to exercise also- my husband and I go bike riding now- for him as well as myself
If your kids like to bike ride perhaps you can get a bike also (I assume they have bikes already) and ride with them?
Try to remain calm- my husband's MS has not taken over his life- we refuse to let it- and besides his daily injections and visits to the neurologist every few months he's totally fine.
Also people with MS still live a normal life expectancy- don't worry about that