The letter u is not a word, and certainly not a replacement for the pronoun you. Take your time to write the two extra letters, and save yourself an infraction tomorrow. Also in English punctuation is always directly appended to a word, there is never a space both before and after any punctuation mark.
I think powerauras will do the trick.
Set it up in a way that it shows u when u have the buff applied to urself , there must be an option to show the amount of stacks