Welcome to HCM,
After going through your history,you had a dyspepsia
possibly due to excessive coffee which contains caffeine this along with hyperacidity
is the reason of bloating
If it is just once it will pass off just take adequate water and avoid fasting and take small and frequent meals. If you trust your doctor then follow his instruction you will be OK.
Even taking antacid or cold milk, should help you, but if you have troublesome symptoms a PPI like Omeprazole
and prokinetic drug will be very helpful which you can get through prescription.
It is possible if you have audition then you have little bit of anxiety
as well so just relax and take simple treatment you will be all right.
Wish you speedy recovery and good luck for audition.
Please take care.