just another gosling
Join Date: Feb 2007
Location: Everett, WA
Bikes: CoMo Speedster 2003, Trek 5200, CAAD 9, Fred 2004
I'm guessing it's a tendon issue. I say that because I got something like this from XC ski racing when I was about your age. It took years to go away, which sounds like a tendon issue. My coach told me to just race through the pain, HTFU IOW, but that might not have been the best advice. I don't have any treatment ideas other than to say: if what you're doing hurts, stop doing it.
Further guessing that it has nothing to do with saddle, but more to do with doing too much without adequate years of preparation and training, and just plain genetic bad luck. There's a chance that a change in fit might help, but I'm guessing not. Whatever's connected to that tendon is still going to have to work to move the pedals.