Stellatum,
I just read some of your previous replies. I do have LOTS, but I am one of only about a hundred confirmed cases in the entire United States. If you still haven't gotten a diagnosis, there is a pretty simple blood test to specifically diagnose Tay-Sachs.
I have three siblings, two older sisters, and one younger brother. They don't appear to be affected, but they are carriers. My 18 year old son has got to be a carrier, but he should be fine because there is very little chance that my wife is a carrier too.
Obviously, my parents are both carriers. Even in the case where both parents are carriers, there's only a one in four chance of being affected. Well my three siblings appear to be fine, so I guess I'm the lucky one.
The thing of it is that I'm actually glad it's ME that has to deal with this horrible disease and not my son. I know too many other families with infants who rarely see their third birthday.