I accidentally wrote a story that was similar:

A man lives alone in his apartment. He needs to return to the office for the first time in months. He arrives at the office, and quickly develops excruciating back pain. A few days pass, and he finds himself unable to work. He also starts finding strange bite marks on his neck and back.

He calls out for a few days, but eventually, he has to go back. He arrives at work and sits in his chair. He quickly feels his back pain return, but also strange movements from his chair. He stands and screams, tossing the chair. The office staff are in shock. He then uses a pen knife to cut open the back of his chair. As he does, there are multiple screams, as a large, spine-like centipede emerges from the chair.

I even did the rough draft for the comic, but never finished. Damn I need to.