[lcarothers]

I'm not an expert - far from it. But it sounds to me that you must start at the beginning and start her training all over again. And I mean ALL OVER, from the basics of sit, stay, and most important NO!(used for all unacceptable behavior) and OUT!(used for her to drop toys, food, and esp. in your case foreign objects)
And, I don't mean to sound rude, but you've got to get control now. What are you going to do in 5 or 6 months?
Going to a great professional trainer will go a long way, not only does the dog learn, you do too! I have had all my dogs to trainers. Rosie, my 6 month old, has begun her training last month. I learn something about myself and my dog at each session(for every dog I learn something new!). You need an objective, good trainer to get you thru this.
I want to tell you that you should be taking her food or chew toys, pretending to take a bite or play, and give it back to her as she sits and waits. You should be asking her at this age if you can have a bite and she should be bringing it to you. But these are things that you should have been doing for months, no matter what the treat (natural or processed) or the toy. But don't do any of this until you've seen a professional.
Of course if this is an overnight change, there may be other issues.
Good Luck!