My dog is a 2 year old shepherd mix and just started behaving really weird. She went upstairs and a few minutes later came down and was in a full hyper panic and kept swallowing over and over like she had something stuck in her throat. We gave her bread and water and eventually that part stopped but she has been incredibly active and talkative since it happened. She can't sit still, she is breathing very quickly and keeps whining. She goes to the door and I'll go out with her but she won't do anything but run around me. It's like she had a panic attack and can't calm down. What do I do?? Is she trying to tell me something else is wrong? Do I wait it out?

I don't know that I would wait it out, if this behavior is totally out of the ordinary and sudden for her.
If she is having trouble catching her breath it could result in this panicky behavior.
I would be giving the vet a call.

Could it be a pill?? And if so, what??

Could it be a pill??? And if so, what???

Good thought, dogs get into medication all the time.