Hi,
I haven't had the camera thing or any ops so I can't really help but I've had a couple of infections and chronic sinusitis so I sympathise greatly! People seem to write sinusitis off as the 'end of a cold' type feeling but it's really really horrible and be so painful so I think you're coping well considering you've had an infection for so long.
Is this a one off type thing for you or do you have chronic also? I find antihistamines help to control the chronic element (+ decongestants and steroid spray) but obviously once the infection is there nothing really helps until they've got rid of it.
I have heard that a lot of people get relief after the procedure to unblock their sinuses so hopefully this will be the case for you.
Please post an update as I'd be really interested to know how you get on, hope you feel better soon