I am Magnus, 18 years old and live in Norway. Back in January this year I fell while skiing and got a concussion. Afterwards I felt dissy and nauseous and skiing became very difficult.
Basically I didn't do anything about it for two days. I was back home studying for a biology test with my sister when I found myself almost unable to form good sentences. Explaining stuff that i normally would have done with ease became impossible. Also I had an headache which had lasted ever since the accident.

The next day I went to the doctor who said I had a concussion which didn't come as a surprise given the symptomes.
I did a MRI which turned out to positive. (Nothing bad was found). He also said I should get back to school and continue with medication for the headache. The next days were basically horrible for me, thinking made my head way worse.
Skip forward a couple of weeks I had a big math test which I had been studying for the previous weeks. After doing math for five hours straight it seemed like it was impossible to think. I remember one of the math tasks which we were given had an identical one in the textbook ( which was allowed) only with different numbers. Even just copying that turned out to be a mission. After that task I just left knowing that I couldn't more math tasks.

After a couple of weeks I went to a neurologist who prescribed me on amitriptylin of which I take 50mg per day. I have also tried acupuncture and been to a chiropractor. Can't tell if any of them have helped.
Now almost 9 months have past and I am still experiencing headaches. I haven't been in school this semester and I'm hoping I can redo the semester after Christmas if I am well by then.
Have any of you found that exercise helps? If yes, what types of exercises should be doing?
Are there anything else I should try?
Any help would be greatly appreciated.