Very tired, aborted at 2.2 miles

I started out for a 3 mile run, but I was very tired and aborted at 2.2 miles. I could have kept going to meet my goal, but that would have made me even more tired. I only had 4 hours sleep last night plus 1.5 hour nap, and I hadn't eaten anything all day. It was late afternoon when I went out. The good news for the day was that, due to the late hour of my run, there was a lot of shade. The daytime temperature, though, was in the mid 90s (F).