She doesn't need to know it's scaring your pdoc. Maybe tell her that if you go to hospital you can be adjusted to your meds a lot quicker as you are being constantly monitored.
It will get you over the depression a lot quicker, and missing a full week of work is going to allow you to be fully productive a lot quicker than tapering onto the meds slowly, having relapses every second day or so...

You will prob see your pdoc every day. And if he feels it necessary, he may pull a therapist in for you to talk to too.
It really isn't that bad - I promise. I'd never been to hospital before I was admitted and I was scared; for no reason in hindsight. Just take the opportunity to sleep and let the doctors adjust your meds. Shout about every little symptom and let them help you.
You'll probably be in the normal ward anyway (I was) and can walk around when you feel motivated to do anything.
Hang in there - we are right behind you every step of the way.