Left my office today at 4PM, the next thing I knew, I was in a strange building not my high rise building going to the 18th floor. It was an hour later, I have no memory of that hour and how I got to this building which is 20 city blocks from my place. I am being treated for bronchitis, z-pak, I also took a zanax at 2PM. This is the first time its happened and it scares me. What can cause this