I just thought I might be able to add to the possibility of seizures and/or anxiety causing disorientation. I've had seizures for 4 years starting when I was 17. Sometimes they were the grand mal (tonic-clonic) seizures and more often after July 2008 petit mal or temporal lobe seizures. I had no idea I was having seizures until May 2008 when my boyfriend who is trained to work with the mentally disabled saw me collapse and convulse with my eyes rolled back. A lot of small seizures would not even be noticeable. Sometimes I just start stumbling a little or my vision starts blacking out, my sense of balance is off, and there is a weird roaring in my ears. Sometimes it will happen and someone is speaking to you but none of the words seem familiar. It is almost like your brain has forgotten your own native language and meanings to each word won't come. You can also just pass out and not convulse but get the aura before it happens. A few nights ago I stumbled to the counter for my glass of water and next thing I knew I was laying on the floor surrounded by broken glass.
I think it could be possible that she had a seizure and fell and hit her head. I've noticed with seizures they tend to not happen for awhile but on days they happen (especially smaller ones) they occur frequently throughout the day and night. It would be interesting to know if she is or was ever prescribed to Wellbutrin (Bupropion) in the past. My seizures started after a psychiatrist prescribed Wellbutrin and the grand mals, at least, stopped after I quit taking Wellbutrin.
Also anxiety can definitely cause horrible insomnia and insomnia can lead to side effects similar to being drunk and sometimes even to a hallucinogenic drug type of experience. After my closest friends died in a car accident I started having night terrors and would sometimes stay up anywhere from 48 hours to 72+ hours. I can remember feeling paranoid at night especially driving because I would see what looked like people on the side of the road that was actually just a road sign. I also remember hearing music and thinking oh wow one of my favorite songs is on the radio only to realize the radio wasn't on. I think if she were having any reasons for anxiety insomnia especially sleep deprivation may explain some of the odd behavior as would seizures perhaps. It would be interesting to know if she had a relapse or possibly started any medicine that had some bad side effects for her? I wish there were more information from multiple sources and perhaps medical information. If her mother for sure committed suicide 4 years ago it would be plausible she might have inherited depression, an anxiety disorder, or some other sort of disorder from her maternal side of her family. That is where my anxiety, depression, and ADD came from for me. I also think paternal wise it is harder to figure out because women seem to be more open to seeing a psychiatrist than men imo.
It definitely made me think of a seizure while reading the information. It also made me think of my brother's girlfriend who had a seizure, wrecked her car into an utility pole and died on her way to work when I was 16. She hadn't had a history of seizures before if I remember correctly and was 22 at the time. I think seizures, partial strokes, and brain aneurysms can pop out of nowhere in people.