first sleeve syndrome?

last night I finished my first sleeve for the cabled hoodie. it wasn't hard figuring out the increases, but I was a little frustrated when I realized that one sleeve had more stitches than one of the fronts (hello, my arm is skinnier than my boob). I thought I was on the fast track to finishing this thing, but it's going to take a little longer. I cast on for the second sleeve last night (2x2 rib is boring enough to do during Heroes) and hopefully can get that done faster than the first one since I am anxious to get started on the hood and the finishing touches of this sweater.
I am also not sure it will fit which is making me very uneasy as I have spent many many evenings, car trips, lunch breaks, plane rides and phone conversations working on this since I first cast on in August. I am afraid it will be a little too big, which is especially frustrating since when I first started it was too small. I also had to raid AFY of it's last two matching dyelot balls of yarn (and three non-matching because I knew two wouldn't be enough!). what is my problem and WHY do I use so much yarn?? this project called for eight balls of yarn, I have gone through nine and still have a sleeve, a hood and all the front ribbing to go! I went to a larger needle size when I realized my gauge problem after I had finished half of the (too-small) back so that I wouldn't have to keep buying yarn, but now I have cleaned Lois out of the flecked brown tweed so I hope this is it ...