I understand that there are scientists looking into our situation from a scientific direction, which I for one am quite happy for as I am not skilled in muggle sciences.
I am going to be looking into this from a, well, magical perspective. For instance, in my world, we recently had a witch who transfigured a group of teen boys into swans, because they were 'too noisy' and interrupting her reading. It took magical law enforcement three days to figure out that the swans in the park pond were, well, not swans. Her excuse was 'if they are going to be noisy, at least they should be pretty to look at while doing so'.
If those who want to help would contact me, either here or privately, and just let me know what you were doing in the previous twenty-four hours or so before you changed. Where you went, new people you met, what you ate and drank, or anything out of the ordinary.
Well, besides ending up here.