Cool, just before you do start over, do you save in stages? This is by far the best way to model, then if it goes wrong or you cant undo something you can always go to a previous version.

Also the mesh is way to dense at this stage, keep it as low as possible until proportions/features cant be tweaked anymore, then divide the mesh or create new loops and build up.

Also the loops on this are to small or none existant, especially around the nose areas, I'll do a sketch and post for you...

Jay