Filtered from Tomoko

Hmmn, there's been something off about Tomoko these last three weeks and I'm worried.

Not only has she been suddenly prone to mood swings that come out of the blue, she's come home from school every so often feeling incredibly tired to the point where she instantly falls asleep for a good few hours. She's even fallen asleep in a few of her classes from what I'm told.
I found that she's been in the school's nurses office a lot complaining of pains, but there has never been any injury or accident to explain it. It seems this happens on the days she's also extremely tired.
The nurses at the school have started questioning if she's just attention seeking, but she's not like that.

I finally took her to a doctor today, but they said she's perfectly healthy and they just assumed it is puberty hitting in a little early... but I don't think that's it. She's only 11.
It's just too strange to me. She's usually so energetic and happy. It's worrying seeing her so tired and unpredictably moody.

I know I'm asking a lot but, if anyone is around her, especially at school, could you keep an eye out for anything odd and let me know?