I finally got the results back from my test. Took a lot longer than they expected.
Anyway, everything is normal. The best guess they have is that I was extremely dehydrated when I had my initial test done, which led to the abnormal red blood cell count. Unfortunately, I do have a history of being dehydrated (just because I don't feel thirsty), so that'll have to be something I work on. Especially when I'm over at the World.