Thank you all so much! I surfed and read about costochondritis. That's got to be it. It describes my symptoms to a tee. I will still go to the Dr., but I'll take some anti-inflammatories and see if that helps. I'm in the process of ordering a new custom bike which should alleviate fit problems, if that by chance started this whole thing.
Sincerely,
Marcia
43 years old, or young, or somewhere inbetween!