Am I just crazy, obsessed with math/numbers, or what on earth could it be?

If you were to forget to count and make the fractions, how would that make you feel? If someone interrupted your counting, would you feel anxious? If it makes you anxious and you feel like you have to this behavior, than you might have Obsessive Compulsive Disorder and if it feels it is getting out of control or interrupting normal functioning, you might wish to speak to a counselor/psychotherapist about this.