it sounds like it definitely is some type of anxiety reaction, but i would say probably not PTSD. it could be a type of OCD or generalized anxiety. i used to have a lot of OCD like stuff where i could have horrible visions, urges, thoughts, or feelings, etc. that caused a lot of distress and anxiety which could be very intense for me.

but unless you have had trauma, a person generally doesn't develop PTSD just from researching things.

i would talk to a doctor about it and make sure it's not something more serious. i assume though you have had an EEG and proper testing right after them to know? i ask because one of my niece's was just found to be having seizures over the last few months and had a lot of testing to rule things in or out.