I was diagnosed with MS in September. I too am very sensitive to most medicines and was very worried about taking an MS drug. I am happy to report that I am at full strength on rebif therapy and doing fine. Please know that we all understand how it is to wait for an actual diagnosis. Try to relax and take it one day at a time. The less stress the better. I know it's easier said than done. This board is wonderful and very informative. Everyone has helped me a great deal. My thoughts are with you. There are lots of people here to help you along. Hang in there.