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If by next Wednesday you mean 10 days from now, then I would try to have a chat with your doctor. I'm not sure when your last camino was, but an increase is 20 kg of body weight is not insignificant. Sounds like you have a diagnosis, so perhaps...
On the rare occasions when I have had to email I have usually attached a translation of my message from Google Translate or similar. Keeping it short and to the point minimises the chance of misunderstanding.
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