A pessary sits above the pelvic floor muscles and takes the load off tissue that has stretched, so the dragging, heaviness or bulge eases immediately rather than over weeks.
It does nothing to your hormones and nothing to the rest of your body. Most women can't feel a correctly fitted one, and neither can a partner during sex with most shapes.
Around half of women who have given birth have some degree of prolapse on examination, and the estrogen drop of perimenopause often turns a silent one into a symptomatic one. A pessary is reasonable at almost any point in that story — waiting for surgery, declining surgery, wanting to keep running or lifting, or simply wanting the heaviness gone by Friday.