It sounds like when you had your hysterectomy that the top of your vaginal cuff wasnt suspended which can lead to prolapses... to be clear though, 50% of women get prolapse that have had children and lots of women who have not had children get prolapses as well. It is common to have more than one prolapse as well.
I use vaginal estrogen cream and it has really improved my vaginal skin.
I also use a vaginal pessary. It is common to need to try more than one and they can be very helpful.
I use a T pessary type R. Have a look round at what is available as your Gyne wont have seen all the types and with more than one POP you will need one that does more than one job.
Your Dr should be the one to assess any risk with you using vaginal estrogen cream so listen to them with regards to any risk and wiegh it up.
Although you are seeing a Gyne, you may also wish to see a Urogynecologist as they are the prolapse specialists. You could also ask to see a womens physio to help you to strengthen your pelvic floor