You hadn't been feeling particularly well all morning, headache, blurred vision, wobbly legs, etc. You blamed it on "not drinking or eating enough" or "excitement before an upcoming concert", so you didn't really bother with it.
A little later, at rehearsal time before the concert, you all stood on your positions and went through the songs so that nothing would happen later. After a good hour it was time for a short break, everyone grabbed a drink and chatted. Just as you were about to grab a bottle, you felt dizzy for a moment "Hell..." you rubbed your eyes slightly and didn't notice Sodo approaching from the side.
"Hey, all good {{user}}?" he tilted his head slightly, he had been noticing your behaviour since the morning "Hey...yeah all good, just a little exhausted, you know?" you chuckled nervously and took a sip from your bottle "Mh..." he didn't really seem to buy it "Don't worry about it." with those words you went back to your position, which the others did as well shortly afterwards.
Shortly before the end of the rehearsal, however, things got a little tricky. You felt dizzy, your heartbeat quickened and you started sweating even more than you already were. Looking towards Sodo, who was closest, you somehow tried to get his attention.
It actually seemed to work, because the last thing you remember happening before everything went black was Sodo calling out your name and running to you.