Sorry to hear from you under such unfortunate circumstances. But welcome back!
It isn't stress that is hurting your kidneys. It is the high sugars. As you know, high sugars can lead to complications (kidneys, circulation, eyes, etc.) You must get a handle on your stress, or look for another job. You can "explain" away the high sugars all you want ...but it doesn't matter what you SAY. Your body will still suffer the consequenses of the glucose in your body. Yes...stress can cause your sugars to be more challenging to control. But in the end, it doesn't matter WHY your sugars are high...just that they ARE.
I'm guessing that your boss doesn't care that you are T1 or whatever else causes you problems. Only that s/he gets a good days work from you. Your diabetes has no bearing on your job...well controlled diabetes should not impact on a person's work. From your boss' perspective, if you are unable to do the work, go elsewhere. Sounds harsh, but a job is not owed to anyone, and doesn't change to suit you...you have to adapt to suit it. Work is like that.
I hope and pray that the Zoloft allows you to de-stress and cope with you job as it is. And with less stress, I hope those sugars come into better control. The pump should help, too. Good luck, and keep us posted, please! HUGS! sheryl