O, first, ouch, ouch, and way to recover

I have not experienced this, and can only say, it seems like you're following all the right ideas for recovery, regaining fitness, etc. That's a lot of miles you're doing, girl!

I can comment on the 165 cranks. I am 5' 1.5" with a 28.25" inseam. I have 165 cranks on my mountain bike, and love them. I wouldn't go longer if I could help it (the new carbon road bike I'm picking up tomorrow will have 165's too.) DH has read a bit of Andy Pruitt's info (the ultimate word in bike fit - I would *LOVE* to go to Boulder, CO and have the real thing done all the way). Long story short, Andy says to shim the cleats, do not use different sized cranks. I'm assuming there is a lot more to it than just changing the reach for one leg or the other, since the shorter cranks affect acceleration, etc.

By all means read up on it, but it seems like you're better off to get longer screws.

Good luck with your scans and the next phase of your recovery! Sending you loads of healing and helpful butterflies,
and hugs,
~T~