1) Congrats on getting lots of stuff out there, and knowing for certain that T will stand with you and talk about any of it!
2) Sorry to hear about the job situation. Please keep in mind that "at will" does not mean it is OK to send you off with abusive words. If any of these words were about your age, gender, race, health status, etc, then that may be discriminatory. Please file a complaint/write a letter of concern to the HR department. I'll bet your T would help you with the right words; you are entitled to stick up for yourself, say "I'm not gonna take it!".
You are right, your T is your ally in all of this.