Morning on the treadmill

I took yesterday off hoping it would help my legs, but I still felt weak today.  I got dizzy, light-headed, and nauseous, so I thought it would be good to walk for awhile.  I opened the window by the treadmill because I thought I was probably just too hot.  I ended up going 3.5 miles, but I probably only ran about 2 of them.  Not sure why I am so beaten down.  I think it was just Sunday's race, plus the travel, etc.  I am still planning on running the 15K next Sunday, the 21st in Decatur, although I haven't signed up yet.