Thanks for writing to H.C.M.
I have gone through your query regarding headache, fever
, phlegm, pressure behind the eye and swelling inside of your nose.
Considering your symptoms it appears that most likely you are having respiratory tract
infection , there may be associated sinusitis
You are advice for these investigations-
1- X-Ray paranasal sinuses
2- X-Ray chest (PA view).
3- Blood- CBC, ESR, Blood sugar (F & PP).
By the inferences of above investigations and there clinical co-relations will disclose the facts for real diagnosis that may be accordingly managed.