It sounds like you might have something called Parsonage Turner Syndrome, or Neuralgic Amyothrophy. The most common thing this does is to damage the long thoracic nerve, leading to scapular winging. It can hit on either die, or both at the same time- but the right side is the most common. Generally, doctors suggest you will recover on your own- but usually not quite to 100% of full function. Also note, that it can be a repetitive thing. In my case, it hit my right hand first in 2001. I had a repeat attack in 2006 that hit mainly my right scapula, but left me weak on both sides, and only minor winging on the left side.

I would suggest conservative is the way to go, but exercise in important. Try to get as much function back as you can. Even if a particular muscle is not right, there may be other muscles you can have take over for that function.

For me, I will always have a winging scapula probably, since it has been 4 years since it started. But, my shoulder is a bit better over all than it was in 2006. It is just not what I would say is anything close to pre-attack.

Also, since this is a TOS thread- This is a cause of TOS. I have it myself and it started in 2006 with the winging scapula.