This is awful.
I couldn't manage a short run this morning - like, less than 5 miles. I set off intending to do a shortie but just got more and more tired and eventually just walked.
I felt terrible.

I know a lot of this is in your head, but my head was so out of it this morning it was terrible. Can I go on? I am planning to get over 10 miles on Saturday morning but at this rate I won't get to the end of the bloody road.

Can it work that you go in for the run and not know you can make it? On this morning's performance I know I can't make it. If the run was this Sunday I wouldn't even bother trying. I have 2 weeks and 3 days to decide. Unless I can do 10 miles (further would be better) I won't start the race. Plus I have to remember what I was like at the start of the 10k - I was too hot, but I also needed the loo and felt like walking all the way round. Sheesh I hate being so bloody weak.