I rent an office on the 2nd floor of a 2 story building. The carpet is the standard blue you find everywhere. Certain sections of my office floor are slanted downwards with some sections (mostly the corners of the room) more slanted than others. When I sit at my desk I am leaning enough to cause next / back pain. If I sit in the corner of the room I swear it feels like I am about to fall out of the chair. Pens roll off my desk, but you wouldn't see the floor sinking just by looking at it.
Assuming no structural or safety issues with the office, what can I do to compensate for this so that I feel like I am sitting on a flat surface?
I am picking up a large floor mat today to see if placing a few sheets of large paper under the part of the mat covering the slanted portion of the floor will raise me up slightly.