I totally feel for you, Kate...as you know! But, you sound a lot tougher than I was. No epidurals for me...just pure, raw pain. I'm not sure how I ever got through it. Nine excruciating months on my back before the pain finally started subsiding. I could barely stand up long enough to go to the bathroom. I'm impressed with your workouts, though, even with your discomfort.
I think PT is a great move. You are right to be cautious about certain movements until your back is in better shape. Do you know the long-term prognosis? Is surgery in the future?
I'm sure you're familiar with UConnJulie (did you catch her
interview?) by now and her expertise and selflessness with helping everyone. She's a guru with lower back stuff so she's a great resource, too...just sayin'!
Regarding your squats, you could do one-legged variations which should add to the challenge a bit.
I'll be following your log closely, Kate! I'm interested in your journey and your workouts are really cool!
Stay strong, girl!