Pain in one finger

I've got a symptom that I'm trying to figure out as to whether it is TMS or not. For the last 2-1/2 weeks or so, my ring finger on my right hand hurts. It feels bruised and sore, like I've jammed it - but I didn't jam it and it doesn't look any different than usual. One morning this last week, I awoke with it very stiff, but that went away. I do not want to spend $300 to get 20 minutes with my doctor, so he can tell me he doesn't see anything and then offer no help (my prediction based on past experience). I am an accountant and I use the keyboard a lot, as well as the 10-key with my right hand. I haven't had any issues in the past, and I haven't had any problems continuing to use the finger. Has anyone had anything like this?