Hi, Amy - I had most of the same symptoms as you but I was always "chunky".
I thought I was pregnant when I noticed my first symptom - loss of my periods. Even though I was faithfully working out most days at my gym and was on track with my foods with Weight Watchers, I gained weight.
And tired/exhaustion/fatigue was with me daily.
It took about 5 years for a diagnosis.
My whole bio is here (although it needs an update): https://cushingsbios.com/2013/04/29/maryo-pituitary-bio/
Why not join these boards so you can read everything we've written about the symptoms you're experiencing now?
Best of luck to you!