There are numerous possible causes of your shoulder problem, which may, or may not, be bass related.
I would suggest you visit your GP and ask them to refer you to an experienced physiotherapist for assessment. If the GP resists your request, stress the importance of your wrist and shoulder to your musical career.
Oh, just one other thing. Threads like this will bring plenty of good will and advice. While support is valuable and the advice will be well - meant, it's no substitute for a proper assessment by a skilled practitioner.
All the best for a full and speedy recovery
T