I'm almost finished writing the thank you notes for our wedding, but I can't stop worrying that I missed a gift somewhere and therefore didn't send a card. For example, an older couple came to our wedding along with several of their adult children and their families. Each household gave a gift except for one. Of course it doesn't matter if he brought a gift, but now I'm terrified that he did and I overlooked it somehow. We made what I think was a very careful list of gifts, but it's always possible. Did anyone else have this problem? And is there anything I can do at this point?