Thanks Mark, for taking time to answer me.

Well, I did ice it and I have taken iboprofen and aspirin, but it is only getting worse. Now I am getting a serious headache when reading or watching television. It feels like stabbing in my brain.

I agree with you and Bud, that this cant be a concussion - the force was simply not big enough, but can it be a kind of vertical compression which has injured my upper neck? It was a medium hard hit. But in that case I just cant understand that it really is enough to give me a new neck injury - my neck must be one of the weakest in the world! But I fear this really much because after my original whiplash injury 4 years ago I had the same problem with headache from reading, and it took me almost a year to recover from...

Really dark times ahead;-(