I agree with Kayty that you should go just that little extra step to make the drawing pop out more. Your proportions are spot on and the shading is very good. I understand the impatience thing, trust me. If you don't want to focus on individual hairs, I'd suggest at the very lease going back to the drawing with a lighter color and highlighting a few areas on the neck and face so it doesn't look so dark. You'd be amazed how just a few highlighted areas can take a drawing from just good, to close to spectacular. Doesn't take more than a few minutes if you just focus on the major highlighted areas.
And Kayty, sounds like you have just had NO luck with fixatives. I have a couple fixatives that are designed for graphite, charcoal, colored pencil and pastel and they specify "will not turn white areas yellow". I have had a lot of success with the graphite and colored pencil, but should I just steer clear altogether with the soft pastels? I was tempted to just try it with the cat drawing I did and see what happens since it is just a gift for my parents, but now I am a bit nervous.