A: you would return to your natural form as the magic sustaining the transformation was suppressed. The duration would continue to elapse and you would return to shapeshifted form when the AMF went away if that duration hadn't expired yet.
B&C AMF only dissallows access to extradimensional storage in its AoE. The contents of your storage device would remain inside that storage space, and could not be accessed until the AMF goes away.