Baby Shower Thank You Notes

I’m in a bad situation and don’t know what to do. Over a dozen of my mother in law’s friends threw a baby shower for me (that’s not counting how many guests came). It was very kind of them but I don’t know any of them. The whole shower was a little odd for me because they were all strangers to me. The night of the shower my MIL and I went through the gifts and made the list for my thank you cards. Since then, my husband and I have gone through a huge kitchen renovation and half of our house is displaced. We’ve been putting together the nursery so we’ve also been organizing, reorganizing, throwing away boxes and bags and such. Now I can’t find my list for the thank you’s! My MIL is going to be so upset with me and I’m upset with myself. I’ve used my amazon and Babylist registry to find who purchased certain items but a majority of the women did not go off my registry. I know my MIL doesn’t have a spare list. What do I do??