I had a lot of nausea, but no vomiting or diarrhea. I wonder if the diarrhea could be a medication side effect? What meds are you taking? Or possibly related to the anxiety?

If the nausea is really out of control, you can get an anti-nausea prescription. I was on Zofran for a couple of months right after my concussion.

My hearing alternates between tinnitus and muffled, at least in my left ear. It also seems to be related to my dizzy spells. It seems similar to the way Meniere's disease is described from what I've read.