awww, Rain............... ((((((((((((((((((((((((HUGS))))))))))))))))))))))
I hate to hear you're so down like this !
I agree that much of it is transition... I would compare it to post partum depression. For so many years you have been striving toward a goal, climbing, climbing, anticipating.... and now you're THERE. At a plateau.
Suddenly "this is it". Perhaps even "is this all there IS?" Your mind and emotions are still wanting to strive, to reach, to achieve. They might still be stuck in that mode, and have not yet accepted the fact that this part of your life is over.
So yes, I believe this is quite common. You are not alone at all in this.
I also believe you will become more yourself once you start on nights. The way you describe yourself, you will fare well. On days, you're feeling like a fish out of water.
If I worked in a hospital, I could not do days with all the commotion, chaos, docs, etc. No way. Ever.
Hang in there, Rain, This WILL pass in time. I'ts not been long, afterall, since you started this phase of your "new life".
But if it worries you, or gets worse instead of better, by all means have yourself checked out. Nip it in the bud. You may just need a "temporary
fix". And that's FINE. :kiss