Two Balls Per Sleeve

It took almost two balls for the first sleeve. So, I can deduce that it will take two balls for the other sleeve I am currently knitting on. And I think I have two whole balls left in addition to the small amounts left over from each of the sleeves.

Should I be worried? Yes, but I am not in a panic yet....I am just merrily knitting along. Going on blind faith that I will have enough for the yoke. I hope to get this second sleeve done tonight or at least close to it. I am taking it with me while I get a pedicure after work. Prime knitting time!