Re: do i?
First of all I disagree with Bobby's diagnosis of it being OCD. Ocd is normally something that forms along routine. i.e. the compulsive washing of hands and the need to memorise things.
What I believe is that you may have a slight case of Authism. I am making this diagnosis based on your need to alphabetise colours. If you'd like to further discuss this in private you can PM me.
If I knew more of what you were like as a toddler, such as if you were advanced with building blocks or if you had any "quircks" at the time it would help. I do feel also that you should take this up with you mother who would be able to facilitate you better then me as she'd know more of your history then you.
"Come away O human child, to the waters and the wild, with a faery hand in hand, for the worlds more full of weeping, then you can understand" W. B. Yeats