I've been lurking here for a while but had to jump in finally since this describes my primary symptom and problem.

My concussion happened on 4/2/2011. I touched wheels with a fellow bike rider while going about 25mph and ended up landing mostly on the left side of my head. I came to a halt by skidding on my helmet and shoulder. No loss of consciousness. I had a minor headache right after but otherwise felt fine. That night I went out for a few drinks with my wife and I can't remember much of the evening. After that I called my doctor.

I went to work the next week with a very light persistent headache. I was having a really hard time concentrating, it was like I had to flex my concentration muscle really hard, and my brain felt really weird. As the week went on things got worse until finally, almost two weeks later I decided to stay home and sleep after a particularly bad day. I woke up the next morning and I was dizzy -- the room spins around.

It's worse in the morning. When I reach over to turn off the alarm that makes the room spin. As the day progresses it gets a little better until I just feel like the room is very slightly moving all the time. Very annoying.

I was doing vestibular therapy and I thought it was helping. About a week ago I felt really great. In fact I was in the doctor for a follow up appointment one week ago today and we noticed that my balance had improved quite a bit. Yeah!

But just a few days later I woke up to the room spinning again, almost as bad as before. Just got off the phone with the doctor and I'm off to get an MRI next week.

I still have other residual symptoms. Mainly I hate loud, busy places. But the dizziness is by far the most annoying thing. Rest just seems to help me deal with it better -- so I can look at a computer screen, etc. But the dizziness remains. I'm totally baffled as to why it improved and then came back again so suddenly.

Wish I had some good advice!