Thegspeak, it is up to you to decide if you want to keep the appointment with your ENT. If you decide to cancel your next appointment, let her know in as much detail as possible how you and specific symptoms are doing. All docs want to know how their recommendations work out for each individual.
Albez, the saliva we swallow with chewing gum is neutral, so it makes our stomach slightly less acidic. I always sip an alkaline tea after a meal, so that helps reduce stomach acidity even better than gum because of its greater volume.