What is the worst condition you have been in but still went to work/school

[Sabeking]

I haven't had anything too terrible; just stomach issues. However, I feel really bad for my DD. She has posterior orthotic tracardia and blacks out at school quite often. This causes migraines and upset stomach almost daily and she pushes forward and goes to school. She spends time in the nurses office to lay down for short periods. There's not a whole lot she can do for it. I really feel bad for her knowing she feels bad almost every day.