How do I deal with facial hypersensativity/pain/pressure?

2 years ago I had an orbital blowout fracture of my left eye due to an assault. I was hit with a shoe on the left side of my face and my tear ducts were severed requiring surgery to repair it all. At first I lost sensation on my face below my left eye, on the top part of the left side of my lips, and my upper left gums/teeth. In fact, this is how the doctor's knew to look for an orbital fracture because it was not apparent at first. Since then, the numbness has been replaced by hypersensitivity, and a constant swollen and/or feeling of pressure that is both incredibly uncomfortable and even painful at times, especially on my lower cheek, lips, and gums. Apparently, this is quite rare for this type of injury. Why is this happening? Will it ever go away? What can I do?

The doctors here are quite baffled and they have all but given up on me. I have searched high and low for other people with similar symptoms, but I appear to be alone. I have looked for literature on the subject but come up empty-handed. I would like to better understand what is going on with me so that I might be better equipped to face the problem, as it is very difficult to concentrate on anything.