I'm new to knitting, fairly new, I've made small items. I began work on my first large item a week ago, a hoodie. I found the pattern in a Leisure Arts pattern book, Awesome Knits for Guys and Chicks. I went straight into the hoodie with the right needles and everything, but I overlooked one thing... the pattern calls for #6 Super Bulky, or chunky, yarn. I've been using #4 Medium yarn and have already completed a whole sleeve. I put the finished sleeve on my arm and it seems to fit just fine. But I'm worried as I go on, the wrong yarn is going to cause a problem somewhere. For now, I'm continuing the project, hoping that using medium instead of super bulky will only result in a thinner hoodie and not a smaller one. Anyone reading this know what I should do?