Ugh, I deserve to be lectured

This is my own fault because I'm so used to "trained" dogs recently. I seem to have forgotten some basic principles somewhere.
I had an interesting weekend with her though.
She has had some severe separation anxiety I can't quite explain. We have the house quartered off to where she can only get in the ferret room, beroom, and we've been trying to keep her out of the bathroom.
Sometime last week I left the door open while I was getting a shower and she started hopping in with me. She LOVES it. She loves to play in the shower so I've been letting her. She also has been hopping in the tub when I'm not in there and trying to get water out of the faucet. At first I thought it was cute so I would turn it on for her. Now I'm realising how that can be problem so I've put a stop to that and I only let her hop in the shower with me every once and awhile (mostly like last night after she decided to roll in pee and I had to bathe her anyway).
Back to the separation anxiety, if I go out of the ferret room and into the kitchen or living room, she gets HYSTERICAL. I mean just absolutely BONKERS howling and whining and just driving us crazy. Ignoring her does nothing, yelling at her does nothing, locking her in the bedroom leads to destruction of the bedroom door, letting her in the living room leads to her getting into some stuff I don't need her in. So we just put up with the whining.
Saturday I decided it was time to just all out annilate my kitchen and clean it and make it so she could go through the kitchen to the back door because I'm tired of carrying her. (she's getting huge) So I sent my husband to his friends so I could have the house to myself and well I spent about 6 hours (it was that nasty, but that's a different story) cleaning my kitchen.
The first two hours she was, of course, hysterical. Finally, in a humor of the situation I barked back at her in the the same way, I went "RAWR RAWR RAWR! Do you see how annoying that is?" And she sat down and just blinked at me. It was really funny.
Throughout the day I kept having to stop for various reasons to go through where she was. Well I would mostly ignore her unless I sat down for a minute and then I would pet her. Well for the first 2 hours (before I barked at her) she would do the mouthy bite thing.
After I barked at her, she didn't. After the initial barking she started whining so I barked again. She sat down. Every since, she's been a relative angel. o.0;; Well, about the separation anxiety at least.
If I leave her little area, she just clamly sits down and waits for me.
Later, after I'd finished for the day (my kitchen is 75% cleaner!) I had sat downa nd she had been calmly laying beside me all day. She wasn't jumpy or antsy, she was calm and nice.
I went in the living room and I said, "I did more than just the kitchen today. Do you notice something?" he asked me what and I said "the dog." he blinked at me and then kind of looked behind me and said "hey, yeh, how'd you do that?" and I said "honestly, I'm not sure."
But she has been just shockingly quiet. She's even not trying to do the mouthing biting thing any more, unless I poke her muzzle too much and then it's like she thinks I want her to, but she stops.
I've been doing the whole "you gonna bbite me, I'm NOT going to pet you" so I think tha's helping.
She still thinks she's supposed to be my lap dog and keeps climbing in my lap when I sit down.
And Saturday, after I did so much in the kitchen I put in an oven pizza cause I was exhausted, I took 3 slices of pizza in the bedroom, sat it on my desk and walked away to get a drink. I came back in the bedroom and Sugar is sitting in my chair, but she's not even looking at the desk. My pizza was actually safe!
Of course, that didn't really stop her from begging and trying to get up on my desk while I was actually sitting in the chair *sigh.
We're working on it :/