Hi Jennigirl
I would take a look to the symmetry and shapes before getting into the refining process. Also, I think adding the ears as soon as possible (I never sculpt without them there) is a must as they will help with proportions and are part of the shape, I see no reason for starting a head sculpt without the ears.
To see the symmetry issues (I can see some problems in the back part for example) you can use a mirror to look at your sculpt. Defects will become more evident. Just in case, don´t know if you are working from a speccific design or it´s freestyle.
Once you have your shapes on place (symmetry etc. or whatever) you should first even the surface before moving on to refining and texture.
You can do this (get an even surface) with a rake tool for sculpting working on a criss-cross manner. Or if you don´t have one you can go with metal saws or similar. But to get to this you will first have to get an even surface by just sculpting (adding/carving). Also passing rake tools in a slight manner will tell you where you are missing material etc.
Once everything is in place as you like it and you have a smooth and regular even surface you can move to the texture job. There are different techniques for this (using plastic film, different tools, alcohol, talc...). But first I would work out the shapes as much as possible.
As for the molding process, will it be a latex mask?