You got me thinking on this one...Is the pain worse at night or in the morning? Does the pain radiate up the outside (lateral)aspect of your arm? What in kind of bike do your ride? When I ask this I am trying to picture antatomically how your arms/hands are in relation to your shoulders. Also you said you were doing a lot of typing..was the surface at an appropriate height? I am just thinking you may have inflamed your ulnar nerve. Kind of like when you hit your "funny bone". This is just a guess on my part since I can't do a clinical assessment via the internet. If this is the case usually ice and rest will help.