I can help you with this, My first doe prolapsed this year.
As long as it keeps going back in, she should be fine. Try and sneak behind her while she is laying down and sprinkle sugar on it.
Be careful she isn't in too tight of quarters with other animals and it gets stepped on.
If it doesn't go back in and she is straining, wash with warm water and cover with sugar and take her for a relaxing walk.
Our vet. told us not to do anything like hoof trimming or antibiotics shots and stress her out, but he said keeping her out in the field with the herd and getting some exercise was the best thing we could do for her.
If it gets to the point were it is really hanging out bad and wont go in then you will need to have a vet come out and put it back in and sew up her vulva.
This will mean you will have to pretty much live out in the barn to watch for signs of labor so you can cut the strings.
We didn't have to sew ours, there was a couple days it looked worse than others and we just kept pouring sugar on. Sugar is good for swelling and for germs.
She kidded out just fine, Once the cervix opens up and they go into labor the prolapse goes back in, and once they kid it doesn't come back.
She does have an increased risk of prolapsing next year.