Busy and exhausted

After playing piano I am always completely exhausted. I have tried something new, a faster tempo.
Today I am completely finished! Have worked on my presentation, classes until 5pm, yesterday evening going out to a pub, until midnight.
It seems they have met again and have talked to each other, Bee and C!
Yesterday, after classes, C came to our classroom, in the hallway where she usually has no business! She had only a C in her math exam.
On Monday I had avoided meeting her at all cost.
Well, I am not yet better, I am still physically ill.
To hell with it!