Ouchie, sorry about your prolapse problems, that makes it very difficult with a clingy kid.
When my kids would get clingy I broght out an unused toy or toy set. I keep things like fisher price barnyard and play people, or playhoue and dolls, Duplos etc away in a closet. I have loads. Then I bring something different out and start plying with them, when they get interested I go off to get something, and come back, I do it a bunch of times, and eventually they let me set them up to play and let me go.
It's the only way I've been able to leave clingy kids and get anything done. You just have to remember to keep coming back and joining in for a few minutes. Or they get wise to it and stop playing and follow you around