Shoulder/neck pain

[KnottedYet]

Little Lyon - your LBS should be able to do a proper fit, and the folks working there probably know medical professionals - Orthopedic surgeons, PT, massage therapists that they've had good care from, and are used to working with cyclists/athletes. So while you're getting a proper fit, it will take time, wear your biking kit, ask them about who they've seen.

YES! Ask your bike shop for PT recommendations!

If you can't afford a full bike fit at the shop (they can take an hour or two, and cost a couple hundred dollars) at least see if you can transfer to a PT who knows bikes and is covered by your insurance. The PT usually can't wrench the bike (liability insurance is crazy) and won't have parts handy for you to try like the shop would, but the PT can tell you what to ask for at the shop and most of all help you with your on-the-bike posture and any fit and safety suggestions while dealing with the frozen shoulder.

Do not give up your bike!

(BTW: I don't doubt your frame is the right size, shop staff are pretty good about sizing. Bike fitting is taking the right size bike and then doing all the fine-tuning and tweaking and subtle changing of parts to make the bike customized to you and your personal quirks and foibles.)