Why I Am Getting White Patch On Right Tonsils Every

Why I am getting white patch on right tonsils every week and due to that I am getting fever and headache what to do I am taking antibiotics with out antibiotics it is not going after taking these many antibiotics again patch is coming in every month it is coming from August first i used to get only throat infection and pain but now I am getting white small
patch pus is coming so what can i do i am fed up with this throat allergies