I agree you should talk to a vet asap. If something did go wrong and the prey is stuck, it could start to rot in there and that will kill your snake!

I'm not sure why you are feeding her prey that is so small, perhaps on the incorrect recommendation of someone?

A pinky mouse { one with no hair} is MUCH to small for all but the tiniest ball babies. A fuzzy mouse { one with just a light coat of fuzz} is okay for newly hatched maybe, but after that any healthy ball should take a hopper mouse
{got all it's hair but eyes still closed usually}. By the time they are as old as yours, they should be eating a large adult mouse or fuzzy rat.

I'm not saying you intentionally underfed her, but that is what has happened. If you get her though this okay, I highly recommend slowly increasing the size of her prey until she's eating what she should be.

My 8 month old balls eat rat pups and weigh in at around 400 grams and are easily 30" long. I only feed them one rat every 5 days, but I believe they would take two if I let them. lol

I certainly hope for the sake of both your family and your snake you can get her over this quickly and easily.

Gale