Thanks for the query.
In your case, prolapse uterus
is grade 3. Kegels exercise helps in only grade 1.
So i recommend you to go for hysterectomy
with bladder upliftment procedure as suggested by your doctor.
Along with the surgery, i also suggest you to carry on with kegels exercise to increase tone of pelvic muscles and to prevent future relapse.
Kegels exercise can be done in the following way:
Once you've identified your pelvic floor
muscles, empty your bladder and lie on your back. Tighten your pelvic floor muscles, hold the contraction for five seconds, and then relax for five seconds. Try it four or five times in a row. Work up to keeping the muscles contracted for 10 seconds at a time, relaxing for 10 seconds between contractions.
Hope this helps