Sorry to hear about your problems.
Not even when rubbing your clitoris during masturbation or sex? Your clitoris is your primary sex organ. If you had feelings in your vagina in the past, you were lucky. Most women do not have much feelings in their vaginas. The prolapse could have caused the feelings inside your vagina to change as your internal organs changed position. Your clitoris should however still be the same pleasure organ it always was. During sex and when you masturbate.
Take care!