The feeling of itchiness inside lower throat and upper chest can be attributed to Hyper-responsiveness of the air passages to an allergen.
The medications prescribed by your Doctor are correct...please continue them.
Other than that,
1. Antihistamine preparations like Allegra
can be taken for symptomatic relief.
preparations, can be used as a maintenance therapy to relieve symptoms of seasonal allergies & asthma
3. Maintain adequate hydration & take a healthy balance diet.
4. Also make sure that you are well protected from cold
, dust & other allergens.
Wishing you a good health.
Thanks & take care.