Joelle I am sorry about your job. I went through a similar rough time last year when I had to leave a job I loved soooo much

I mourned as if there was a death!
I loved the people I worked with and I actually looked forward to going to work every day.
My job consisted of having a very sharp mind with no room for mistakes. I just couldn't do it anymore. My fatigue was dibilitating and my mind felt like mush.
I still have the fatigue but now when I feel bad I can lay down.
It does get better with time and you will find your new normal
Good luck. I'm thinking about your