"can i sue as a caregiver for emotional stress

The legal cause of action you are discussing is "intentional infliction of emotional distress."  They are traditionally fairly difficult cases to prove, and you must have significant measurable damages.  The behavior of the offender must be "outrageous."  From what you describe above, it does not sound promising.  However, your best option would be to sit down with an attorney in your area to get all the facts and then give you an opinion based on the whole picture. Best of luck.