Hi there! Understanding your situation, i think its better to continue the current treatment upto exam And consult an homeopathic doctor later to get an permanent relief to it.
Health Tips
Meanwhile u can take a few steps to reduce it.
avoid pet if u have
dont use carpet at home and use washable curtains n blinds; clean house regularly to make it dust free
use airconditioned room if possible
use a mask to cover ur mouth n nose if its cold and which worsen ur condition
regular exercise can strengthen ur lungs n heart
hope it helps
Best wishes for exams!