Hi thanks for your question.
Difficulty in swallowing along with pain throat means your also having pharyngitis
along with sinusitis. Sinusitis is usually complication of untreated pharyngitis. pain in ear tiredness and weird head are due sinusitis. Sinus infection
is little difficult to treat as penetration of drugs is poor in bone. You have taken plenty of antibiotics with no relief. Consultation with an ENT specialist
is advisable who may examine you sinus through a very small fiberscope. He/she may perform FESS that is functional endoscopic sinus surgery
to eradicate infection from sinus
Hope this answers your question