Alig,you are only 12 days from giving birth so dont go thinking about a prolapse yet…it is much too early. Your body has to get back to normal and that includes the uterus contracting and getting back to its normal size. Are you breastfeeding? That will make the uterus contract.
Do pelvic floor exercises every day, and make sure you have the 6 week check up with your doctor. That is the time to ask him/her about a possible prolapse.
Is this your first baby? Normal delivery?