I've had those. They have always gone away. The more I ignored them, the faster they went away. They can be a bit disturbing but I would take my blood pressure to see if there was a problem. It was sometimes just a bit elevated. Maybe just a reaction to the sensation.

An EEG would be useless unless you had one of these episodes during the EEG.

There are a variety of different chemistries in the body that can cycle and cause odd things like this. Unless this became chronic and interrupted your life, I would just learn to relax through them.

I would not take the Lorazepam routinely. I have clonazepam ( another benzo) in the cabinet that I have used when they do not settle down on their own. Propranolol has also worked if it cause a spike in BP. So, I just know that if it is a problem, I have access to a med, just in case.

Otherwise, I go on with life.