I have forearm, wrist, and hand pain too. I've been exploring options like the ErgoDox and split keyboards. I tried out the Kinesis, but I found that I was still having some ulnar deviation as I used it.
From everything I've read online, you shouldn't let your RSI symptoms go too long or you may end up with permanent or harder to cure effects (nerve damage, for example). I'd see a doctor as soon as you can.