Prolapse or cyst?

As I’m sure most of you can relate, at almost 38 weeks pregnant I need to shave with a mirror to see what I am doing 😂 I noticed what looked like a ball shape bulge inside my vagina- so of course I googled it and everything pointed to it being an Uterus or bladder prolapse coming out, which freaked me out! My doctor today looked at it and claims it’s a cyst… but I still feel I have some of the symptoms of a prolapse. Has anybody had this happen and it only be a cyst? Or should I ask for him to take another look?