hi kassie, with new management and policy changes often times this happens. they don't know you personally as ppl before did. also the job market has been so competitive that i believe companies have become a bit callous, imo. i worked in upper management for years and everytime there were changes everyone had to adjust once again. with other things going on in your life this past year i think you went on overload emotionally. (i am not minimizing how you feel) just like you said it was the last straw. hope you have a good support system outside of work. i'd suggest you discuss how you feel here and with them. you need that right now. if you have some vacation time consider taking some days off to give your mind time to recharge.
you have been successful At what you do. remind yourself of those accomplishments. try not to jump the gun considering changing jobs. there's no need to do so unless you want to. try to focus on doing what you do so well and make every attempt to let this snafu roll off your back. i know it isn't easy...you've put your heart and soul in your job. continue to do that.
i'm not sure what you said but there might have been something misunderstood by them to give you the reply they did. i don't necessarily agree with their posture. what i do know from my own experience is that saying anything other than "yes" to a company is a no-no even if you're right. i dont understand that mentality but that's what i figured out early on.
are there other things not mentioned in your post re the job?
sorry for the rambling. know we're here for you and ready and willing to listen. we care about you.