It's difficult to be ill when you're a teacher. You hate leaving your students as you know that means interrupting the ongoing stream of learning, the routine.
You also get frustrated that you didn't wash your hands that extra time, get the sleep you needed or avoid the point of contagion. But, people get sick, injured and interrupted--that's part of life. A part of life that exists in every field as evidenced by the canceled conference, the sports player's leave, and the meeting delayed. A part of life that serves to remind you that you're human, and a part of life that builds empathy and compassion too.
Hence, it's time to get better and then return with a new commitment to a healthy schedule. Fortunately this is only a small bump in the road.