Rather than going through the pains of using a brush, I think there are some fluids that can replace the regular toothbrush. You pour some into d mouth, hold it in the mouth for some minutes and then pour out.
I think that would solve the issue of bleeding and as regards your mouth coupled with your condition, the dentist should be professional enough to have den cases similar before and should be able to handle it. So don't let it stress u emotionally dear..
ELDAHCEE