hello i read your question and understand your concern
according to your history as you went through
hysterectomy and now your history is "SOME THING COMING OUT OF VAGINA"
so i would like to ask that
* when the thing is coming out i mean when in squatting position ?
* on coughing
when you go for passing stool while increasing your abdominal pressure while passing stool?
* you don't have any problem with urination?
* did you went for total hysterectomy?
in my opinion that might be a
vaginal vault that is coming out and you can push it back easily
so i would suggest to see your gynecologist as early as possible
and show this to her as one can exactly will get to know after examination
i hope my answer will satisfy you
good luck & tc