No, Rai! Not at all! It means when they collected the tissue sample they may have collected some of your cells and those may have been the ones tested. You did nothing wrong and it's, unfortunately, just one of those things that can go wrong because it's an imprecise testing process. There are additional tests that can be done at the same time to confirm or rule out maternal contamination, but the majority of places don't seem to do those yet. I know they weren't done with ours. The problem is that you don't know if you lost a healthy girl or if it was your cells (since you are a healthy girl). Any "boy" cells are definitely the m/c and most unhealthy "girl" results are certain to not be the mother, so this is pretty much the one result where there's a chance the result is inconclusive.