You know what? This is the best news I could've gotten. For two reasons.
1. I'm not crazy. I was going a little nuts the past month or so with the health anxiety, wondering if it's in my head, wondering if something more serious is wrong, etc. All the tiredness and pains can be completely explained away by this.
2. I can fix it. Easily. I already take a multi-vitamin, but I'll be adding in D3 to boost my levels back up to something more normal. I'll get my levels tested in three months to see how they're doing and evaluate from there.