Hi Donna,,,, I was reading about your shifting delima,,,I was out riding with my new Specilalized Road Bike just shy of 30 days old with 75 miles new road miles. Well I experienced the most difficult bike ride ever. I could not shift up in my higher gears, (all new concept with no idea what gear you are in because it does not show us) I was beside myslef for the awful ride my daugheter and I had. I felt like an old lady on her bike for the first time. I called my Bike store LL BEAN in Freeport Maine (20 minutes away for me) they were able to fix me up. Here is what they found. THe pedals had become loose and was causing to much distance so I could not shift up to my higher gears, ( I thought I was haveing a senior moment and cold not remeber what I had done to shift a few days before) was I happy to find out I wasn not so senior moement and the problm was fixed at the shop and I was back out today for a 25 mile ride and all was well. Have your shop check out the pedals. My chain came off 3 times on that day. Ugh Hope you find out the problem soon. Bette Boop from Maine