Hi,
My concussion was in late March, the headaches were disabling, had to lie down in the dark, light, voices, actually any kind of noise sent me insane. I totally understand how your gf felt when the dryer made that noise, that darn buzzer can be torture. I was also exhausted from just a small conversation.
I have actually come a long way with mixing up words etc, still do it and my husband says I don't finish sentences sometimes but it is better. I will search and search for the right word and there's just nothing in my brain, it all takes time.
The disorientation is a lot better, I was in vestibular therapy which I know helped, probably got better a lot after about 5 months but I could feel improvement along the way.
You are such a wonderful person and I know this is so stressful for you, my husband said I was a completely different person, as you know your gf's brain is injured, I was told everything is misfiring and it takes time to heal.
I fought all this in the beginning but paid dearly so your gf must not do too much even if she feels she can, take it very slowly. I know when I did too much that terrible headache would be back for days.
You are both in my thoughts, please let us know how your gf is doing and take care.