i agree that you should check into the DHHS regulations immediately (just in case you need to use that as a trump card) but you mentioned that the test you took the very next day was negative. that would make a great argument against the first lab's results if the test comes back positive. so no matter what, i think you'll have enough to dispute a bad test. hopefully it won't come to that. start doing the research now and try to relax until you know for sure. i hope everything works out for you and your kid. i know what its like to have that kind of responsibility.