Thanks for writing us..
Mitral and Tricuspid two valve are there in heart that separates atria( upper chamber) from ventricle( lower chamber). Regurgitation means leakage of the valve..
You have not mentioned the cause of regurgitation, That is important.
In your age it may be- MVP
, RHD, CONGENITAL etc...
You should start B blocker for palpitation
after advice of cardiologist and be in continuous follow up of him..