I'm referring to the fact I feel I may be too stretched so felt 1cm less reach just felt more "correct" to me.

The doctor is referring me to be tested for HLA.B27 my mum and uncle has it and could be possible I may have it and also suspicions of Rhumatoid Spondyloarthritis so unsure what effect they may be having and possibly could make a normal correct bike position feel wrong and may be why I get neck in pain.