Hi there. This is Dr Satya Kiran ENT Surgeon from Hyderabad.
Tonsils do not get increased in size usually because of stress. As per ur description of ur condition in your age is because of chronic tonsilitis. A short course of antibiotics will help the acute exacerbation, but Tonsillectomy would be the final answer to end this repeated infections.
Next Steps
avoid cold food items
ENT consultation