Soreness and scratchy throat for 4 month

I ma having soreness and scratchy throat from last 4 month.. i went to so many ENT specialist and they find different different possibility.. one ent said that i have acid reflux but i actually dnt feel any heart burn sensation and one find post nasal drip as he send me to ct scan for nose and resulted as ethmoid sinusitis . He told me i have post nasal drip thats why i'm having throat irritation and imflammation in throat and he gave me one month medicine and suggest me if we wont find any changes then we need to go for sinus surgery. But i dnt want surgery thats why i never return to dat doctor. Then i change my doctor and went to another ent specialist he order me to do ct scan.. and that resultes as same sinusitis and lymphadenitis .. then my doctor told me that everything is normal . You having juss infection . But i dont feel normal .. actually i searched lot on google and find long term sore throat related to cancer . Does it means dat having only sore throat is cancer??