Glad to hear Callie is a little better today, Roasted. Fingers crossed she continues to improve.
Happygolucky, lots and lots of very short periods separated from you to start with. So literally step out of view and then straight back in, in and out the door, then shut the door for a second. Walk from room to room without her following you etc. When you get back, don't make it an event. Just say 'Hi Jessie, good girl' (if she's been quiet) and go about your business to let her know coming and going is just part of everyday life and not big deal.
Click treating her for being in her crate (or wherever you want her to be left when alone) is another good starting point and very simple. Just sit near the safe space, give her a chew or kong, click and treat her every few seconds for staying there. Then try standing up, continuing to click and treat, then step away, then stand in the doorway, then step through the doorway, then out of sight etc. Very gradually build up the length of time you're out of sight for before click treating. If you don't have a clicker, just say something short and sweet like 'Yes' to mark the good behaviour before treating.
I totally understand you going for her sleeping in your room, rather than upsetting the neighbours. I have the same fear, hence us only just starting to sneak upstairs when he's asleep two weeks in. 
Pip has obviously picked up on me not being quite right today and has apparently forgotten how to sit on cue.
I should have known better than to try and do some training with him when I'm not right cognitively, so have knocked it on the head and aiming to just keep him out of trouble for the rest of the afternoon insteaed.
I am still working on his positive interrupter though, as we really need it now the greengauge tree is in full fruit and dh didn't pick all the fruit or fence it off over the weekend like he promised. (I can't do it as I have a morbid fear of wasps and there's tonnes of them all around it.)
The other thing he's having to work on today is asking to go out, as I've had to keep the back door shut so he doesn't constantly head out there and up the top of the garden to find more fruit.