If you can get some ultrasound therapy it helped me a lot.

I couldn't do crutches I found it made it worse for me. I was taped a few times when the brace wasn't enough. But mostly moving correctly, limiting stairs, and getting dressed whilst sitting. All those things helped. And do keep seeing physio post birth and if you can do some Pilates to strengthen after. I also slept with a pillow between my legs and used a pregnancy pillow to support my stomach to keep my straight.