Possibly what you are having now could be some adhesions & impingement's causing trouble.

If you read about fascia and how it can get sticky-- this stickiness can make the muscles stick to the nerves and cause a lot of problems.
There is no test that will really prove it.
But you can read about it and try some of the stretches and passive positions to see if after a time some improvement is happening for you.

Sharon Butlers repetitive strain injury Book really helped me to understand about fascia, but I had to re read it a few times and do the stretches in her book to for it to really sink in.
And it did help me quite a lot.
She also has a website with a lot of information on it.
www.selfcare4rsi.com