My not so tempo run

I was scheduled for a 6 mile tempo run yesterday. Coming off my easy 2 miler from the evening before, I thought I could knock this run out. I felt so amazing on my 2 mile run, like I was superwoman, haha. I did the 2 miler at about 9:00PM the night before, then the Wii Active, finishing my working out at about 10 or 10:30 give or take. I woke up in the morning to run at 8:00. Starting off, my legs felt heavy. I noticed that my breathing didn't feel right and I was having a hard time. I just couldn't get into a groove. Then, there was road work on the Boulevard on a bridge, so I had to take a detour around. It was bad. I plain stunk. I think that I started off too fast, still on my high from the run the night before. I was supposed to warm up at about an 11:30 min/mile pace for 1 mile, run 4 miles at a 9:40 pace, then a mile cooldown at the 11:00 min/mile pace. My splits are as follows:

Mile 1: 11:02
Mile 2: 9:53
Mile 3: 10:06
Mile 4: 10:01
Mile 5: 11:13
Mile 6: 11:51

I was close to my pace the first 2 miles, but completely fell off after that, having to stop and walk several times throughout the whole run. It was really ridiculous. I mean, I couldn't even keep my normal pace! It was just a terrible run, but I'm not going to let it get me down. Runners just have bad days, and they are completely unexplainable. From now on, I'm not going to do a full workout the night before an early run. And, I HAVE to make sure I'm hydrated enough. I think that may have been an issue, too. I'm not going to let this get me down. I have a 5 mile race tomorrow morning, so I'm going to take today as an off-day, or I may get some core training in. I'm running the Run for Your Life 5 mile Race, part of the Smoke on the Water Chili Cookoff. It's supposed to be difficult, running up Spring Hill Cemetary. I'm going to take it easy and not kill myself. Hopefully, it will be a good day.

Run stats:
Total distance: 6 miles
Time: 1:04:09
Ave pace: 10:41
Calories burned: 707

Next run: 5 mile Run for Your Life race in the morning
Total miles for the week: 16