Appreciate all the advice.
Debra, sorry I didn't mean to come off like that … what I should have/meant to say was that it's difficult for me to wrap my head around this situation (feels like I've come home to a different dog), not that I can't accept it. I'm hearing all the advice loud and clear and I really appreciate it, was just looking for some guidance from people who have been through this before... I was worried about taking wrong steps and making the situation even worse.
I think you're right - once we're able to move back into my house it will definitely be easier to get her in a routine and I'll go from there, I'm not sure if she was getting enough exercise while I was gone either which could explain why she's a little more on edge.