Barney,
Interestingly, I'm just about to start a thread about PPLs and confidence.
That 150nm QXC gets to everyone! When I did it - the old CAA one - it was much shorter. A very experienced f/w instructor friend of mine thinks it's far too long, and I agree. You did well to realise you were overloaded (not always easy to recognise) and to admit it to ATC; lots of pilots wouldn't - and they should.
There was a thread on here a while back about being nervous before flying - and a lot of people admitted to it. But these are anonymous forums; less people will admit to it in a club atmosphere. At the risk of being told I'm sexist, I think this is more of a problem for men than women - but aviation is extremely male orientated. I admit when I'm nervous - and I keep getting told I have a confidence problem.
I do, but quite often my nervousness is justified. It's just "not done" to admit it, which I think is wrong.
Anyway, I'll go start that other thread....