I've had influenza for the past four days: cough, fever, headache, nausea, blocked sinuses, blocked nose, but alongside it I've also had the most severe diarrhea of my life (and I hardly ever get diarrhea..) is this normal with flu?
Yep, diarrhea, nausea, vomiting are all par for the course. Try an over the counter remedy, if you feel its needed. Just be sure you stay hydrated, drink lots of water. Gatorade can be ok too, just don't drink it excessively.
Hope you feel better soon.