Imposter Syndrome

It’s annoying how I can be doing really well one day, and the next I plummet into the abyss of self-confidence and creative crises. 
What if I’m a fraud? 
What if my art is shit?
What if I’m a horrible person and all the voices in my head affirming that are true?
 
I have to write to get it outside of me, is that stupid?
 
Am I as shit as I feel? As my parents said I was?
(no)