Oh BeatUC, I am so sorry. I was hoping you were going to tell us you're doing better and better...
I can't speak to your impaction question, sorry.
I have no scientific proof, but magnesium usually works wonders, what if they gave you liquid magnesium IV and oral, might that loosen the impacted stool and render it soft enough not to rupture your colon?
Sending you big hug!