Sometimes my day is not that good...

I have found that I tend to be generally a happy person.
But sometimes, like this moment I seem to be
not as happy as usual.
I'm not exactly sure why I don't really have "bad days."
They kind of don't make sense to me, why would you start yourself off on a day with a bad attitude
and keep telling yourself it will get worse
and that's all there is to it?
I guess I just don't understand that.
But what I really don't understand is how come
that happens to everyone, or at least most people
I know, and it doesn't happen to me?
When things don't go the way I want them to that I was really hoping for, or I get really frustrated about something then I get upset.  Maybe I'm just selfish, I don't know..
I hope everyone has a great day, and if you are sad and are trying to be happy.. just remember my motto..."no regrets"
If you don't regret anything and use everything as a learning experience you will never feel that bad.  Sure you might feel a little guilty, but you can learn from your mistakes
because no one is perfect.