I'm at my wits end with my dog lola. She was a rescue and will be 3 year old in May. So about 4 nights ago she started panting, hyperventilating, pacing, drooling, shaking and being super clingy. This was only happening at night as we were getting ready for bed. We have not changed her routine, there are no new pets, lights, no loud noises. Nothing has changed. Now she has started doing it in the day and its gotten worse. She will not leave me alone at all. And she also will not listen at all. She won't sit, stay, lay down, nothing, just follows me and freaks out if I leave her sight, even if I'm in the same room. Then when she is close to me, she sits on me and doesn't let me move. We took her to the vet and he said physically there is nothing wrong with her and medically there is nothing wrong. She gets walked 2 miles 6 days a week at the least and the doctor can't figure out what is going on either but its driving us insane. He even gave her a low dose of xanax to see if it would help and it's not. I feel trapped. I cant do or go anywhere. Not even across the room. She has never been like this. We have had her for over a year now and she's never behaved this way. Has anyone else ever faced something like this? Does anyone have any suggestions on what can help?