I was diagnosed with a uterine prolapse at 36 after my first child and was utterly horrified. I hadn't even heard of prolapse until then - it was certainly never mentioned in any of my ante-natal classes.
The first step in treatment is normally specialist physiotherapy, where you are shown how to do pelvic floor exercises properly and progress is assessed using biofeedback equipment. After, or alongside that, you could use a ring pessary inside the vagina, which would hold the womb up. Your gynae will also probably discuss hysterectomy with you, which obviously gets rid of the womb problem altogether, but not an option if you want more children.
After my womb prolapsed, my bowel and bladder quickly followed suit! Sadly, neither the physiotherapy or the ring pessaries worked for me and I have had a lot of surgery to sort things out. After a bowel re-suspension and a hysterectomy, I'm starting to feel more like normal again. My pelvic floor is still shot to pieces but at least I don't feel like my insides are falling out!
On re-reading this, I realise it does all sound a bit grim but that was just my experience and perhaps bad luck - my gynae thinks I've got crap tissue which doesn't stretch and ping back, it just snaps. I do know other women who've managed to get on top of the problem after doing pelvic floor exercises faithfully several times a day for months on end. In retrospect, I wish I'd been pushier about getting access to physio much earlier - although my prolapse was diagnosed a couple of months after my baby was born, I didn't get a physio appt until more than a year and half later!! - and that, then, I'd worked harder on the pelvic floor exercises. It's an exhausting condition to deal with, partic if you have very small children to deal with at the same time, and I gave up a bit at one point. That was a mistake because it got a lot worse during that period.
Sorry if I sound a bit grim, like I say, this is just my experience and surgery isn't necessarily the outcome. Many women manage very well with the ring pessaries if the womb doesn't move back up completely.
Good luck!