Her hormones are on a see-saw...she needs to get used to what's now coursing through her body. She's probably feeling a bit anxious. I had a mild, transient, behavior change in my yellow girl (6 month spay).
That said, Sunnie was ballpark six/seven when we had her spayed and her existing anxiety skyrocketed and never came back down. Too many years of hormones and then she was all of a sudden like a menopausal human.
The stuff-eating might have something to do with having been cooped up and now all of a sudden "free"....like a younger pup's introduction to the wide world outside. Gentle corrections and fast fingers.
Hope everything evens out.