Don't forget that when they're spayed they lose the calming influence of some of those hormones and it's quite common for them to become a bit more reactive as they suddenly lose that. This was around the point that Bella's fear aggression really took off, actually - she'd started being fearful previous to this but looking back, it was once she'd been spayed that it really started to get worse, so it's worth keeping an eye on it and giving her as many positive experiences as you can with other dogs.
Glad the sleep seems to have helped her, it can make such a difference
It sounds like you're doing all the right things - we've definitely found with Zorro that us being really calm and not doing exciting games in the house with them has helped him. I really miss the games
but in the long-run it's worth it as it was obviously all too much stimulation for the poor little mite. He's a delicate soul!
OT but he had his 4th McTimoney session yesterday and she was really pleased, said it was the easiest one yet, not nearly as much misalignment going on and the adjustments that needed doing were much smaller and easier. His behaviour has been impeccable for the last 8 weeks (since his last McT session actually) and it's great that his body is learning how to be a bit more correctly aligned as well. Him and Bella are back to their old selves again, Bella had been really subdued for a few months while he kept having a go at her, and is now back to her old whirling dervish minxy mode!