How's it going Kevin?
I've just been mulling over your account of your epic run whilst out on the fells alone today (where I do almost all of my most profound mulling of course!)
I can really identify with the 'low' you experienced after completing the LEJOG.
After some of my big runs, I have often hit a real low for a week or so afterwards, but I'm sure that I can't even begin to comprehend what you went through / are going through after your six-week epic.
I still don't know what causes this.
You may well be on the right lines with the Endorphin crash.
Fatigue?
A feeling of deflation and total emptiness following completion of a project that has been all-consuming over the past months?
Maybe all of the above, compounded by sleep deprivation and severe depletion of the body's resources - physical, mental and emotional.
One thing I am more certain of is that you WILL recover, but it is going to take some time, even for someone with your undoubted resilience, tenacity and mental strength.
I'm sure that writing about your experiences is a huge step towards finding closure and moving on to other challenges.
So, take it easy over the coming months and look after yourself.
Kev
PS Put me on the list for a copy of your book!