Elusive Self Confidence

Self-confidence is a mythical animal. I did not know that it was a thing until some people started telling me that I didn't have any of it.
I think most people waver around on the spectrum of self confidence like one of those spinning things in old board games. Everyday you give the spinner a flick and it lands on how you feel about yourself for the day.
Some days you think I am pretty cool - but other days you remember that once in second grade you accidentally sneezed a booger into someone's hair and they found it and blamed you...and you think "I am a looser because of that thing that happened in second grade which came back to me right now for no apparent reason".

(Just in case you missed out on the Moon- Moon saga and have no idea what I am referring to - http://imgur.com/gallery/aYCs8 No really click the link and read it.)
Represented differently thus:

I over compensate for bad days by pretending that I am unendingly awesome which just makes me come off as obnoxious.

However, have also met some people who are unfailingly and constantly on the over confident side of the spectrum. This is annoying - really, really annoying. You might be suffering from over confidence if you catch yourself saying the following things:

1. I am surprised that my essay did not yet win a Nobel Prize. It is so awesome that if it was a book it should be so covered in those shiny award stickers that no one could read the title. (Like Newbery award etc)

2. I am surprised that there is not a Google doodle in my honor... every single day
3. In order to be cooler than me one would have to possess and army of adorable puppies that would appear out of nowhere whenever they wanted them.
4. I read so fast that I literally have no idea what this chapter said, why are you not impressed?

Lastly if I ever write a book I will be sure to stick some fake shiny award stickers on them like this-