I Have Discomfort Between My Shoulder Blades Which Runs Up

I have discomfort between my shoulder blades which runs up to my face - no real pain just a sensation - then it goes all the way down to my foot - the odd thing is then it switches - 2 days ago it was on my right side - the last 2 days on my left side. Wondering if its a pinched nerve somewhere or so the possibility of a blood clot? Not sure which doctor to see - do not want to just cover it up with anti inflammatories or pain medication need to know the root cause of this - it's been going on for months now, advil and aleve moderate the discomfort but I can still feel the tugging sensation. Started to see a chiropractor but without knowing what it is - afraid to make it worse instead of better? Any idea where to begin?