g you to quit, it's either because they're trying to be graceful and give you the opportunity to leave without tarnishing your work record, or more likely, because they don't have grounds to fire you.
You don't have to answer this if you don't want to, but do they have any written correctives against you, anything documented that states you haven't been performing your job to their expectations?
A while back I got talked to about calling in sick too often. I corrected that issue though and this is entirely unrelated.
Well, if you're an actual employee of the company (not a temp or seasonal employee); if you're meeting the written requirements of your job; and they don't have any (relevant) documented complaints against you, they don't have grounds to fire you, especially if you're willing to remedy whatever "issues" they have with your performance.
If however they continue to pressure you to quit or continue to make your working experience miserable, cite the words "Hostile Work Environment". If they understand employment law as well as they should, that should make them think twice. It essentially means that they have created an uncomfortable work environment, and if you leave the company because of it, you have grounds to sue them.