You might have felt this way for a long time and didn't realize it could mean you are an artist. Or, you might be feeling this way (in a big way) for the first time.
Luckily, there is endless advice to be found from the legacy of artists who navigated this terrain before us, people whose inner world was drastically different from the outer world they found themselves in. They made art to make the outer world look a little more like their inner world, in an instinctual desperate need to align the two in order to make sense of anything.
A nudge to those just finding this out about themselves: begin with a rediscovery of yourself, both the bright and the shady places. Pick yourself apart daily, bit by bit. Turn the pieces over, inspect them gently. Be ready to be surprised by what you find, both pleasantly and terrifyingly. Without this self-inspection, the rest will be much harder, so do this hardest part first. Then you'll be more ready (though never completely ready) to spiral back outward into the absurd and gorgeous world.
"Be interested in what disturbs you. Rebel against your inclinations. Find beauty in the imperfect. Interrupt yourself. Disorder and chaos will serve you if you direct them. Cultivate elasticity, expand. Dismember the expected. I believe in the unbelievable."
(-selected from Philippe Petit's Creativity: the Perfect Crime)
(Photo from Rise Up and Shine, Butterfly: Chrysalis Sky Funeral, Linda Wingerter)