Mid life crisis at 43?

Today is Sunday 15.05.11 and I awoke at the usual 6.00 with my kids.

I Should be happy . I have 4 beautiful kids and a wife who loves me.

I run a highly successful and profitable inter net company http://www.in-the-fashion.co.uk

I have an nice ish house, a newish car and why is that not enough?

Suddenly everything seems out of focus in a weird way, its like I got up this morning and everything feels odd.

I have been 43 for 5 months now, so it cant be the sudden realisation that I am 43 can it?

Maybe its just one day blues and tomorrow all will be well with my world or maybe not?