Sore throat after every 5 days. This?

From my childhood onwards i have been a victim of sore throat. It happens to me after every 5 days. I have to take Histaftee180mg and Zifi200 after every 5 days to cure the same because it becomes extremely seviour. I am not able to speak or anything and furthermore it leads to fever later on. To stop this , i went for homeopethic medication... she said that it is not tonsils but constipation which is the reason for my sore throat. I was shocked to hear this at first but she said that its true. Though i myself have noticed that when motion passes my throat startes feeling better but medication of constiptilon wasn't able to help me in the long run. For now i am just relying on the antibiotics but i am afraid those can be harmful. What to do? How to cure this?