tricuspid and mitral regurgitation

I have a history of tricuspid regurgitation (discovered in 2004) and mitral regurgitation (discovered in 2008). As they are rated as mild, therefore I have not built up an habit to have the follow-up annually.

In this year, however, I started to suffer from more frequent attacks of lost of consciousness (three times in this half-year). Actually, I have been suffering from such lost of consciousness occasionally since my primary school years (more than 20 years ago). It was only until 2004 that I was sent to hospital and diagnosed with a mild tricuspid regurgitation and vasovagal attack (tilt table test result as positive, mixed type).

The situation of this year seems to have become worse as I suffered from more frequent episodes of lost of consciousness. Every time I was diagnosed as having vasovagal attack in A & E after electrocardiogram.

I understand all diagnosis can only be confirmed with clinical examination. But may I ask for your kind opinion if I can just perceive these symptoms as simply vasovagal attack, or they are reflecting some other problems as well? Also, should I resume annual echocardiogram check-up on my heart valves annually? (Some doctors said I should, but some said no because my tricuspid and mitral regurgitation is rated as mild only.)

Thank you very much for your advice in advance.