Hi.
Thanks for your query and an elucidate history.
I am fine here, thanks for asking.
Noted your complaint of the day started with headache, feeling tired and loss of concentration.
Your ENT has advised you Surgery for enlarges mass (meat as you say).
The causes of such mass causing symptoms are:
Nasal polyposis
Inverted papiloma and such cancerous tumors
Hypertrophied tumors.
I would advise in such a situation the following:
MRI of the nose and
sinuses to assess the mass, its extent, vulnerability, vascularity and so on.
Dedicated team to operate upon your mass.
To continue any medical treatment if needed like decongestant, antibiotic,
steroids as required.