Its good she is eating and drinking. What are you feeding her?
When Pearl had MBD we got the calcium from the vet, its called Nutrobal and we just gave a pinch daily on her food. But its good to always give a cuttlefish bone like you get for birds, they usually nibble on it when they require some calcuim. I also grate some cuttlefish on their chipmunk food once a week to make sure they have enough. If you can get pure calcium carbinate powder then you can sprinkle that in the food or it can be mixed with water and made into a liquid you can syringe feed. You can mix it with honey, peanut butter, anything she may like to get her to take it.
Oh we had to change Pearl's diet too when she had MBD. Remove sunflower seeds and peanuts from the chipmunk food, these are not good if it is MBD, they will interfere with absorbing the calcium. So for now just feed her the rest of the chipmunk mix/hamster mix and give extra fruit/Veg which you can sprinkle the calcium on or inject it into it. Also yoghurt containing calcium and VIT D such as Petis Filous is great and some cheese. We also gave Pearl some oranges, these are good for absorbing calcium For Pearl it was a few weeks before we noticed improvement, it takes a very long time for the Chipmunk to recover, they have to rebuild all their bones again and replace all the calcium lost during having the MBD. Once the chipmunk is back to normal behaviour you can then reintroduce some nuts and sunflower seeds back in.
Is she an indoor Chipmunk? if so she may need a Full Spectrum reptile light to give her VIT D she needs to help absorb calcium. I got one for Pearl and had it on from 8am till 8pm. They need replacing yearly.