I'm getting sick every few months, and I don't know why. I'm in Bangalore, and it usually starts with a sore throat and then leads to a cough, cold, and fever. The fever lasts a couple of days, but the cold and cough can drag on for weeks. I've noticed it can happen after I travel back to Bangalore or start going to the gym, or even sometimes during normal days. I've seen a lot of doctors, even at Manipal, but they just give me meds like Amoxicillin and cough syrup without looking deeper into what's going on. I'm really frustrated. What can I do to find a long-term solution for this?