Are you still stumped? I have this as well. I'm going on a year. I've been to so many doctors with dismissive responses. I finally took matters into my own hands and after a little research, the photo, video and characteristic comparison quickly narrowed this down to a rotifer species. One attribute that I find inescapable is the fact that I find these objects dried up and "crunchy" around the house so when I learned that a rotifer dehydrates itself to ride out the storm and blow with the wind I found it rather obvious. I have a video where this object is clearly viewable nipping at my finger (upon utilizing zoom). So now that I am as close to positive as an intelligent educated person can be without forensic testing or expert opinion, what do I do about it? I find it difficult to believe that the medical community is incapable of diagnosing and treating??