Were you "partially circumcised" at birth? I know some parents in the US have opted for a "partial circumcision" for their sons (I saw a few boys done that way and half of the glans was uncovered) but your circumcision must have been extremely minimal.
I thought, right to the end, that what you meant was that you were slightly trimmed and that you'd "trained" the remaining skin to cover it. Anyway, as long as you can keep it that way during fellatio, you should be fun!