I wrote a big long post replying to each of you but my computer ate it.... so this one will be shorter!!!!
Thanks to everyone that replied. It mean alot to me that I'm not alone in this. to all who feel the same sometimes, I hope we can continue to support each other

Thanks for all the great advice. I really needed a bit of a kick up the butt to stop wasting the good times worrying about the possibility of bad times and to take things one day at a time.
It's also a really good point to remember that there are always people less fortunate than us so thanks to those who pointed that out.
I'm feeling much more positive about life now so Thanks for all who contributed