Thanks guys.
Day 6, and at the moment, it seems to be at least a bit better, swallowing still hurts, but is already better, I can manage to drink 3 sips of water. Since yesterday I also take vitamin pills, as I don't eat at all yet, thus getting no vitamins at all. Guess my body is quite out of minerals.
But I don't yell out yet, as it's still bad, and yesterday I had a bit the same feeling, and during the afternoon, the whole shit got worse again. Fever is also still there, have to see how that goes.