The cost of a valve replacement is something I am not qualified to answer. You need to talk with your doctor and health care providers. My valve surgery was 35 years ago which has no revelance to today's cost.
thanks, how much would a valve replacement surgery cost
I share portions of your history. I too, had rheumatic fever at a young age--about seven. Aortic value disease was diagnosed at 15 by a cardiologist although my family Dr. heard the familiar murmur much earlier. At 30 the regurgitation had reached the stage where the diseased valve had to be replaced by a mechanical valve. Now 65, the valve is still going strong and doing well after 35 years.
If your valve is leaking, it is what it is. Body position had no effect on the leakage. Just maintain the position where you feel most comfortable. The best advice I can give (you didn't ask me, of course) is to take care of yourself and know your limitations. You need not try to impress anyone or prove anything. Your heart is already working harder at normal just trying to pump out the extra blood that backflows into your ventricle. Drinking even moderately is not helping the situation. Maintaining normal weight and blood pressure is extremely important. Talk with your doctor about the concerns you have expressed here. You can continue to live a "normal" life style if you recognize your problem and live accordingly. I am not implying anything here. Just use common sense. When the time comes to replace the valve, I am proof that this procedure works. Until that time comes, again, be good to your body and it will be good to you.