I think the key here is to figure out just what's happening with her.
Tonight, I'll ask her if she wants to give up piano, but I suspect she'll say no. She writes her own music and loves playing, but I think she's just not in the routine of lessons. Of course, I could just be projecting and she might say she hates it and it's causing anxiety. We're not pushing for exams to be passed. This is supposed to be a pleasurable past-time. If it's not, it's certainly not worth the £18 a lesson we're paying!
I have asked her about school lessons/anxiety but will chat with her again...maybe not tonight. I think she'll be pissed off with me today for sending her to school, so maybe a night of dvds and ice-cream after piano. Maybe asking her if she wants to quit piano will put me in good books.
If she still feels poorly next week, I will take her to the doctors. She could be anaemic. She looks like something out of Twilight, except her eyes don't glow orangey/brown, but she's always been very, very pale. I haven't taken her to the docs in the past because she's always been so healthy. I said this morning, four illnesses in a short period indicates something's not right. That means we need to sort it out. If she's poorly again in the near future, that will confirm it for both of us and leave us in doubt she needs to go to the docs.
It's parent's evening soon. I'll be asking at school if there are any issues, either academic or social that they are aware of. They are choosing options this year, but dd has always known what she wants to do and does not seem worried about this. She's been told she's a 7c in classics and that's made her really happy. Similarly for her Creative Writing. She's not doing so well with the English Language, but that'll come. Her maths is average, but she's o.k. about that so I don't think that's a source of anxiety.
DD is very independent. She's also quietly tough...not cocky, but a rod of iron in a velvet glove kind of tough. Her friends have told me before now about how she gets on with nearly everyone but that she doesn't suffer fools gladly. She had one girl, an aggressive girl, being horrible to her in the early part of the year, but she stood up to her. In addition, a friend of this girl stood up for dd saying, 'leave her alone, she's in my French group and she's lovely'. Said girl came up later and was nicer than pie. I get the feeling dd can handle herself o.k. but that doesn't mean something might not have gone wrong.
DD and I have had lots of lovely chats lately about friends, boys at school, life in general, how she feels about the friend she fell out with, what she wants for the future. That doesn't mean there aren't issues, but she has generally talked to me about things. I'll let her know she can talk to me about anything she wants to and see if anything comes up from there.
Thanks for all the advice. Fingers crossed it's just teenage grumpiness/laziness. If not, we will take whatever action we need to.