In a piece I am working on, I am talking about my little boy when I say;

He heard his name dozens of times a day; Timmy don't...Timmy you always...Timmy stop...

I do not know how to punctuate this. Do I use quotations? All of the references to what I say (ie Timmy don't..." are phrases in which there is an ending but I don't want/need to say what that ending is. The point is that my little boy heard all these negatives all the time. Can anyone help me?

Lavinia