Graphomaniac, a person suffering graphomania.

Following definition was found at Wikipedia.org

Graphomania (from Greek γραφειν — writing, and μανία — insanity), also known as scribomania, refers to an obsessive impulse to write. Outside the psychiatric definitions of graphomania and related conditions, the word is used more broadly to label the urge and need to write excessively, whether professional or not.

According to Kundera, graphomania is the groundless claim, sometimes being large-scale, of being a writer:

"The irresisitable proliferation of graphomania among politicians, taxi drivers, childbearers, lovers, murderers, thieves, prostitutes, officials, doctors, and patients shows me that everyone without exception bears a potential writer within him, so that the entire human species has good reason to go down the streets and shout: 'We are all writers!'"

—Milan Kundera, The Book of Laughter and Forgetting

Made in the 70s, raised in the 80s. I am a married, mother of three. I spoke in complete sentences at the age of eighteen months. I have loved words my whole life.