Thanks Mark.

Not going does sound like the better idea for now. I understand your confusion regarding my diagnosis, which was by a couple of MDs and the athletic therapist/osteopaths at the concussion clinic that I visit. They said that intense bumps or jolts that one can receive when tobogganing can cause a concussion. I did not have such symptoms (except fatigue) before and do not have any diagnosed illnesses from general checkups. It's a mystery but considering my head sensitivity (to sneezing or stumbling for example), it reckon it's something in my brain. I had normal CT and MRI scans.

Best wishes,
Henry