rach --JL is right in that you seem to have been doing all the right things for good health.
In reaching your diagnosis of MS, do you feel the doctor tested for and ruled out the MANY other possibilities? I am afraid that there is a tendency to hear that your mother (or other family member) has MS (or another "autoimmune" disease) and then diagnosed you with the same (without looking further).
I understand that diseases can run in families -- MS, too. In fact, there is a family, in which there are eight members with MS, in PawPaw, Illinois, a town of about 800! But, since I believe that a malfunctioning pancreas begins the MS cascade, I think this may be the inherited element (or it may be the diet learned in the family).
Do you or your mother have type II diabetes? Or a diagnosis of "insulin resistance?" Has your doctor ordered a "fasting serum insulin test?" (BTW, a desirable result would be 9 or below.)
Other than that, my suggestions include: 1.continue a healthy diet (especially low in carbohydrates) 2.continue a strong exercise program and 3.read all you can about MS.
AND frequent this website with your questions and contributions! Welcome, rach.