sinusitis and throat problems

It would be greatly appreciated if you could give me your precious advice.
I have been suffering from sinusitis for a long period (since years) and the
symptoms have intensified since the last ten months.
The symptoms are as follows: tonsils and throat inflammed since months;
pains and pressure in my eyes , ears (especially left), eyebrow region,
forehead and at times at the lower back of my head region and feel tired.
I feel a lot of pressure/force in the nose, forehead and eyes&throat regions.
My nose is blocked most of the time; at times I find it heavy/hard to breathe,
(which peviously made me feel very scared , having palpitations and panic attacks).
The nose & throat are often very dry, especially at night & in the mornings.
(I started teaching in a school in Italy and did not have good experiences there and
later left the job, because the symptoms were there at their maximum.
My health has greatly improved since I have been at home.)
I still have a lot of irritations in the throat area, a lot of mucous discharge (at times yellowish),
the throat is always red / small blisters (when I check in the mirror), my gums are often
inflammed and sore, at times my teeth hurt; I also get blisters in the inner cheek area of
the mouth.
At times (especially mornings) I observed small tiny, solid yellowish-brownish particles
(small balls/pea looking like) coming in my mouth along with the mucus. Also the mouth/throat
area sometimes has a terrible smelly odour.
I also observed that I find it hard to speak for longer periods- throat hurts and feel hoarse.
Most of these symptoms bother me daily and I find it at times impossible to carry on with
my normal routine.
As far as I know I do not suffer from allergies. To be sure that I don't would you advise me
to do the allergy test ?
I have completely stopped taking dairy products. Should wheat products/cereals be avoided ?
I have been to the ENT and the doctor advised me to take a two week antibiotic course, but I
decided to use the natural approach.
I did an ecography for the thyroid in March; the test showed increased dimensions (longitudinal
diameter of both lobes : 5.3 cm) . Would you need the detailed information from the test ?
Would you advise me to get a blood test and another ecography / doppler ecography done ? (to
ensure the proper functioning of the thyroid)
Could it be that the symptoms are caused only by the sinus problems ? Could the thyroid be involved?
I am really interested to treat and heal it completely and know about the likely causes ?
Could it all be bacterial ? Should I maintain professional concerns ?
Preferring the natural approach, I am aware that the Bioforce products : Luffa Complex Nasal Spray,
Plantago, Cinnabaris, extra vitamins could be used for the healing process.
I also know that Kalibichromium is effective. I read from your sites about Merc. sol. and baryta carb.
Kindly advise me which natural remedies would be most effective to cure the symptoms mentioned.

Thank you,
Kind regards