Welcome to HCM
If your heart rate
is > 90 during rest and as you underwent a Echocardiography
and found to have mild Mitral valve Prolapse
This is not serious heart problem in this AML anterior mitral leaflet is long (redundant) and prolapses in other chamber of heart and some times produces leakage from valve.
In tis condition usually no treatment is required but if fast heart rate is there your Cardiologist may give a course of Betablocker like Ciplar(Proparanolol).
In your case other causes of fast heart rate like hyperthyroidism
should be excluded by T3,T4 and TSH.
you may be having hyperacidity
and other GIT problem for excessive gas formation which can be easily treated.
Do not worry
Good luck to you