I would think she got the mouth rot *from* rubbing, not rubbing because of it but I know that would not be good news so I REALLY hope it's not the case. Hopefully getting this all cured up fixes the issues. She might get so grumpy with all the manhandling and gum rubbing, hopefully all goes well. That's awesome you found such a great vet, shame she's so far away. You're such a great keeper to do so much for this retic that is obviously becoming a headache. I really hope she knocks out the pushing. I wish I had more ideas to offer.
8 scales would make me think male but not for sure... eep seems like you'd need a helper to try to pop a snake that big!
Wishing you both well