Welcome, sandrab. I join Cece in welcoming you and reinforcing with her your own idea that you need to go to a new neurologist and get a second opinion.
Your questions are very good – do you need Rebif and Ampyra? Your situation and treatment need be discussed with the new neurologist.
Again, I agree with you that exercise is very important. I also believe that diet can have a great impact on MS. I encourage you to look in that area; I myself have recent interest and hope in the case of Dr. Terry Wahls – she encourages a special diet (http://www.TerryWahls.org
) which seems to have helped her own MS.
This community at ThisIsMS understands much of what you face; ask your questions, please share what you find. We do not have all the answers, but we try to help each other. Welcome to our "club."