squamous cell carcinoma of maxillary sinus

I had radical surgery on June 9, 2008 that removed parts of the following on the left cheek
Eye orb
nose
cheek bone
upper jaw
hard palate
sinus
nerve
Wondering how long the ache in the eye muscle will continue and the pain at surgery site.
Will not be having radiation treatment.
I have been treating with Ratio-oxycocet 5mg-325mg oxycodone hcl/acetaminophen. 2 pills in morning and 2 more at 4 hr. increments and 1 extra strength advil.
I have had the mouth prothesis made so I can talk and eat but it has been causing pain despite weekly adjustments.
I have little energy and can only work for half a day before I have to have a 1 or 2 hour rest after lunch.
Bye the way I am a 74 year old man that is still working. (on the freedom 85 retirement plan)
Before I had cancer I was very healthy and worked full time and find it difficult to adjust to the change that has occurred since my operation.
I am looking for anyone with simmilar experiences to get suggestions on different ways to handle the pain and medications.