Hello,
Definitely let us know how she is doing. Since you had fed her some grapes, did you chop them or slice them up for her,
or did she chew them up very well? They can store food in their beard sometimes so that isn't out of the realm of possibility
since you had mentioned it is soft. If it becomes hard to the touch then you might need to get her to a vet if it doesn't recede.
Let us know how she is doing.
Tracie