Some people say Anti inflamatory pain killers help, i can't take em myself as they make me ill but might be worth a try.
Antibiotics would be worth trying too if you haven't already as most sinus pain is apparently down to infections.
Tried both of those Bob I bought myself a neti pot yesterday and it seemed to work. It did give me the feeling of coming down with a cold but with the pain gone, it is worth it.