Yeah I would definitely avoid doing any activity where you have a very high chance of getting hit in the head again for at least a year or as in my case I plan to try and avoid activities like that for the rest of my life.
I learned my lesson this spring already and still suffer for my mistake.

If you can handle physical activity then do it, I personally can't, but a friend of mine who went through PCS didn't have a problem working out to max capacity.

I have the same issues with my eyes, where if I spend a day without TV/Computer I feel much better, but several hours in front of a computer at work cause me issues although it is getting better very very slowly.
I've been to the neuro-ophthalmologist and he couldn't find anything wrong.