Knee!

Wow...what an impact an injury can have on one's outlook. I feel so dejected and lost...all because I couldn't run Sunday. Literally couldn't run :-(
After Thursday's and Friday's runs, I knew that I should take Saturday off. Again, that gave me the perfect chance to get fitted for new shoes. Yesterday, after doing the weekly grocery shopping, I came home and laced-up the new shoes. I wanted to take them for a test run...just a little loop of maybe 2 or 3 miles. As I got about 30 seconds (!!) into the run, I felt a wierd sensation in my right knee...I can't even describe it now, but at the time, I knew I needed to stop immediately. I was really puzzled...my legs felt really fresh and there wasn't any residual pain from Friday. So, I walked up the hill a little further, and picked up a trot again...and needed to stop! It was uncomfortable...nothing I've ever felt before :-(
So, I turned around and walked home in a daze. I mean, I had just bought new shoes, the weather was fine, my training was going well...I hadn't anticipated anything like this. So, yesterday and today has been filled with ice and anti-inflammatories. I want this to get better *now*!
As of tonight, things feel okay...I know this is nothing more than a little set-back. I'm going to try a run again tomorrow after work. If I feel any discomfort, I'll stop and rest-up longer. Anyone have any ideas/advice?