Pessary causing problems?

Body: 

As a pessary user, I am concerned about some references I've seen suggesting that pessaries used to relieve cystocele symptoms may contribute to development of rectocele. I use a donut pessary for moderate/severe cystocele. Ultimately I hope through posture work, exercise, diet etc. to achieve the level of comfort without the pessary that I now enjoy with it, BUT I certainly don't want to cause a different problem in the meantime. I would appreciate any comments on this.

Thanks (:
Jean