Medallion Screw Up

Here's another photo of that medallion I've been working on for ages. I had a terrible time getting the mane and forelock to look okay, and then with a bunch of other minor adjustments, I've concluded that I ruined it. I hadn't measured anything in a while, and now the cheek has blown up to giant proportions, the bridge of the nose is too big, and the neck is too thick (I think). It's supposed to be a Percheron or draft cross, but right now I think it looks like a pony. *Sigh* Back to the (sculpting) board...