I've been riding since March on a hybrid. 3 wks ago I started riding a road bike. Each time I ride I notice that I have a pinching pain in my left upper middle back shoulder blade area. It's not too much on the right side but very pronounced on the left after riding for about an hour. I've read that if there is a pinching pain between the shoulders (on both sides) it could be that the handle bar reach is too short. But I'm not sure if what I'm experiencing is indicative of a fit issue or my physical condition.
Last week the bike shop guy who sold me the bike, without taking any measurements, said that I might be hunching or tensing on my left side. Today I paid extra attention on my ride to be sure that I was *not* doing either of those things and I still had the pain after an hour.
I want to take the bike back (again) but this time be armed with some info/suggestions of things to change. I'm not sure if the handle bars are too wide and if that even matters but I figured I'd ask y'all first :-)

Q