What Causes Recurring Pain And Infection In Throat?

hi this is Deepanchakkaravarthy (24) Male. i had suffered from sever allergy in last 5 years back. i got treatment for 6 month.they told me the reason that is changes of blood cell count difference.(like WBC, eosinophil count increased,..) My age is just 24 and now completed MCA and i am not a smoker and drunk. Symptom: size changes of feet, hand and skin with sever itches. Then sever Cough with cold and some times with fever. While become cough i felt to tough to breath. After treatment i got relax of 2 years. then again i got allergy in throat with sever pain.But that time not cough also continue sneeze upto 5 to 10, 15... so my throat got sever pain and infection. it will continue upto now with cough and sneeze. i met so many Doctors and ENT. But all of them told me that you are perfectly all right. No problem to worry. But i feel i had some interior problem. i dont know know what is that?