need more info...

Are you still taking P&B shakes? If so, stop immediately as some people go into detox crisis which can be very painful and extended.

Is your mother drinking enough water additionally to the juice? Minimum is half your body weight in water.

Is she having any bowel movements? It's important to do the SWF (Salt-Water-Flush) with Sea Salt (not Epsom Salts !).

We really need more information to be helpful!

Gatorade is not a good idea - it is full of crap (including food colours and preservatives ), neither are the crackers as after 20 days the body has difficulties digesting - breaking a fast needs to be done SLOWLY, otherwise you will either throw up or have the runs for hours on end.

Have your mother drink LOTS AND LOTS of water, juices, preferably veggie juices, as they are less aggressive and give us more information on what BM and the likes.