I'm so glad it's not serious!
If the nerve tension is coming from muscle pressure, you might want to try to find a massage therapist skilled in myofascial release. I've been having trouble for a while now, and finally found a good one - sometimes it can be a little uncomfortable & I'll be sore after a session, but it really makes a difference, rather than the temporary feel-good of a regular massage.
Relaxation and meditation can help make you more aware of your body, so you know when to rest, and can respect your limits, in addition to improving your posture.
There's a lady in Canada who does something called Classical Stretch that's GREAT for loosening up a tight upper body, and correcting your posture from hours of computing. www.classicalstretch.com
Her shows air on some public television stations.
I don't know if your problems are related to repetitive strain, but this is a great website resource for that: www.rsiprogram.com
I hope you're better soon!