I have had a lot of sinus infections 2 years before getting diagnosed with vitamin D deficiency. After starting taking vitamin D, only once ( in 8 months) I have had sinusitis, now I only get a little pressure and I can feel something is draining from my sinuses. I sometimes use steroid spray when I feel like there might be something starting again and I get some relief from that.
The symptoms you describe are typical of a sinus infection.
Your doctor can prescribe an antibiotic for you.
To help to clear the sinus congestion you can do steam inhalations.
To do a steam inhalation, boil up a kettleful of water and pour this into a bowl, taking care not to get scalded. Put in some Vick or olbas oil or a few drops of any menthol oil. Bend your head over the bowl and cover your head and bowl with a towel. Breathe the steam through your nose and out through your mouth. Do this for a duration of around 10 minutes, 4 times a day if you can. This will help to get rid of any mucus irritation and congestion. You can do this for as long as is needed.
Drink plenty of fluids, honey and lemon, chicken soup.