Background Check Worries

Howdy howdy,

I recently applied for the position of sales rep, and am now waiting for a background check to go through-

However, there is a glaring issue. I lied on my resume. Filled in gaps, exaggerated my position. Does past employment get verified or is that dependent on the firm?

(I am very aware how stupid I am, by the way. I haven't really held a job down in a good minute due to taking care of a relative in hospice.)