Vicky I see the tank, nice + clean and has a good climbing log. Does she have trouble climbing now ? And very important, what type of lights do you have ? The reason she's small and has MBD is because you need to give her calcium every other day, but right now it could even be daily. Not in large doses but small, regular doses.
She also needs a good heat lamp and
uvb bulb. Without those she will never improve but will only get worse. If it's warm where you live get her out in the sun everyday for an hour, that will help a lot. Offer her medium [ not large ] crickets, 4-5 at a time twice a day. To help her poo, offer her any of these [ or a combo of all : baby food squash, sweet potato or prunes. Canned pumpkin [ no spices , unsweetened applesauce. You can add a couple drops of veg. oil to any of those, but get some of the baby food + canned pumpkin ASAP. Offer it via syringe with extra water for
hydration. A warmer than usual
bath every other day but no belly rub in her condition it could be painful.