Panic Attack or seizure?

I have a 3 year old blind dachshund we rescued.  She has had 3 episodes during the middle of the night over the last two weeks. When I wake up, she is on her feet, shaking and drooling profusely. I have scooped her close to me, petted and talked to her when these happen. She then stops shaking and drooling. She has never done this before. Due to work shift changes, she has been at home by herself during the day, when normally someone has always been home with her. She is extremely skittish now when we do get home from work. I am wondering if she is having a panic attack or some type of seizure. Any insight is appreciated.