I found out at age 61 that I had BAV. I'm glad no one diagnosed it any earlier, but it was sure good it was diagnosed when it was and not overlooked. Despite this congenital defect, I led a perfectly active and care-free life right up until the diagnosis. I ran track in high school and was a VERY fast 10K and marathon runner later in life.
Once the diagnosis is made, follow-up exams and echo studies are important, especially if there are any symptoms (shortness of breath with daily activities, any chest pain). I never had any symptoms but echos showed my valve had finally started to stenose down rather rapidly, going from 1.1cm to 0.7cm in 9 months. My aortic root was 3.6 ("borderline") on echo, but a CAT scan showed more diffuse enlargement, and despite my lack of symptoms, surgery was indicated due to the appearance of my aorta and the rapidity with which my valve was closing down and the associated rising pressures were having an effect on my heart.
I certainly experienced a lot of anxiety and loss of sleep after I received the diagnosis. That's understandable. Unless you have information to the contrary I would not change my lifestyle just because you discovered you have had a congenital defect. These valves can operate very well for many decades, as mine did. If the degree of stenosis and regurgitation is minimal and the pressures and left ventricular function are normal, things should go on normally until those change. They may never deteriorate enough to justify repair or replacement. Somewhere between 1 and 2 per cent of the population have BAV and a good share of these never have surgery.
So, if BAV is confirmed, yearly echos are important to monitor the status of the valve and your heart muscle's response to it. If it is essentially stable and you have no symptoms, carry on.
There is no benefit to repairing/replacing this if it is stable and asymptomatic. However, if the valve (or aorta) is unstable, like mine was, getting it repaired early before there are significant changes to the heart muscle is reasonable even without specific symptoms. So, mine ended up getting fixed only a year after diagnosis. Had it been stable, I would have postponed the surgery as long as my active lifestyle was unaffected and I felt perfectly healthy. Exactly when to get the surgery is a judgment call. Traditionally surgeons waited for SOME symptoms, but more and more surgery is being done earlier before the heart muscle has accumulated significant damage. Also, my surgeon was more aggressive than many in pursuing the aortopathy of BAV. The "traditional" approach uses an arbitrary dimension of 5 cm where the risk of aneurysm becomes much higher, but this is a continuum, and my surgeon felt the risk of surgery is less than the risk of "wait and watch" with smaller but abnormal aortas.
If you are young and the condition is stable, take advantage of the early warning you received to become more familiar with the condition and research various approaches that might be taken, but be sure not to let it affect your enjoyment of life in the interim. I'm glad I didn't. 61 years of ignorance worked in my favor, but that last year scrambling to deal with rapidly progressive BAV was not a lot of fun.
