Free and low-cost clinics tend to be ... crowded. The doctors are overworked, and don't have time or expertise to deal with issues like this. Bike fit problems aren't easy, and require specialized knowledge that they don't go over in med school to deal with. ( When I had a fit problem and bad shoulder pain, my doctor sent me to a couple of physical therapists instead of dealing with it himself. The only 'treatment' he gave me was vicotin for after long rides. ) Going to the clinic probably won't solve your issue, so you'd be better off posting photos here ... a lot of us have been through a number of bike fittings.