I think if you feel abnormal compared to how you were before or to others than its natural to question if something is wrong - human beings are problem solvers by nature. Ive always known i was different - others seem less emotionally affected and appear to be able to communicate more effectively and with less effort. Trust me if i could 'choose' to behave differently i would but at least by being aware i have more of an incentive to actually do something about it. You don't have to be mentally ill to experience mental illness - none of us are infalliable, we are just as susceptible to being 'mentally' sick as we are 'physically.' With all the research and testing that has gone into improving the treatment of mental conditions i would encourage anyone to seek a professional opinion if they feel something is wrong - you can either put your mind to rest or live in constant doubt. I know which one id prefer.