MS multiple sclerosis or Lyme disease

Hello doctor, I’ve been diagnosed with Relapsing-Remitting Multiple Sclerosis (RRMS), I make 2 MRI’s brain and spinal cord and found lesions both of them..since august I’ve been diagnosed I’ve noticed some strange things happened to me..first of all I’ve lost weight, more than 15 pounds in a year, second I’ve noticed a light face atrophy in the left side, arm and legs weakness and tremors..is it normal..does multiple sclerosis affect the weight I am taking Tecfidera for ten months Age:38 Male