Bunny - you an me both - just posted a thread myself as I am having a few days like this right now too.
You mention eating junk - I'm usually pretty good with nutrition and a bit keen on it but to be honest lately this has been none existent with loads of sugar and rubbish etc - coincidence - maybe its not helping either of us - difficult to halt it tho when feeling like this but guess that might be an idea for both of us to try.