Last day at toxic job is tomorrow...but still feel sad?

Tomorrow is my last day at a job I have spent almost 6 years at. I envisioned myself staying there for the long haul. I love my immediate coworkers and my direct supervisor. My boss is the BEST boss I will ever have and helped me to grow tremendously in my career.

Sadly, the upper management changed recently and it has been incredibly toxic. My boss has been job hunting. I wanted to stick it out with her, but I also didn't want to be left behind when she inevitably found a new job. When she leaves, I would have become the interim supervisor in my department and would have had to directly endure the verbal abuse and harassment she has had from the new upper manager. I've gotten a bit of it in my position but no where near to her level given my status beneath her.

I feel weird. I am excited about my new opportunity because it is a move up and a great opportunity. I'm also nervous and afraid that I will fail miserably. I'm excited to get away from the toxic work environment I'm in....right now i have major anxiety, stress, trouble sleeping, and physically feel ill and constantly exhausted. I'm sad though to be leaving the best boss I will likely ever have and will miss my coworkers.

How do you all recommend getting through tomorrow? Any advice on how to maintain relationships with those I leave behind? I am usually so bad at staying connected with old colleagues. I will be only 10 minutes away though so I hope it will be easier this time to stay in touch by meeting up for lunch every month or so.

Also, any advice on how to recover after a toxic work environment? I feel like it is going to take me a while to feel normal, not be paranoid, and relax a bit. I have 2 weeks between jobs as a way to decompress and get into a good headspace for my new position. I'm just so ready to feel normal again though when it comes to work.

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