Welcome to healthcare magic!
These bumps are actually the vaginal folds, they are the natural structures in the vagina.
The nature has given the vagina the capacity to adjust, it will handle gigantic looking penis without trouble, with some hormonal
preparation it can deliver a baby without being injured.
These fold are actually the redundant space that is in collapsed state normally.
And gets flat to create extra room to take the penis or give passage to baby.
So do not worry, Thank them for being there and feel reassured that they are there so to make you a perfect female.
I hope this advise would be helpful for you.
Wish you a great health!