Dear friend, welcome to HCM.
a well asked question.
u r a clear case of chronic sinusitis
.if antibiotics and conservative treatment has not helped all these years, and osteum is blocked, it may mean need for surgical clearence.
nowadays, ENT fellows who are well trained in it can do minimally invasive endoscopic surgical clearence of sinuses
...FESS....as it is called and is a minor procedure.
u can consult your local specialist and see if there is still a scope for some medical treatment only.
if surgery is must, I see no problems in undergoing one..
take care and get well soon.
pl. keep me informed if this helps you,