Last week friday i went to an amusement park and went on a few of the extreme rollercoasters. since then i have been feeling quite strange, i have had dull aches on the side of my head as well as feeling as if i zone out when looking at my computer?

Can be normal, but..: This can be a normal after riding rollercoasters. They can affect your balance centers and cause some strange feeling symptoms. However, if you have a headache and "zoning out" you probably should see your physician just to make sure it is not anything serious. You may have hit your head while riding without really realizing it, and you should be evaluated for a concussion.