Shaun-
I'm not a doc, nor did I stay in a Holiday Inn Express last night. However, I do have experience with painful elbows.
It 'sounds' like tennis elbow - aka lateral epicondylitis
Try this link:
http://www.scoi.com/teniselb.htm
I had it several years ago - same symptoms as you - could not even pick up a quart of milk. I iced it and took double doses of aleve (naproxin sodium), which helped - a little.
Finally bit the bullet and saw an orthopedist - got 2 cortisone shots over 9 months IIFC - been pain-free ever since.