For the last couple of weeks not been feeling myself feeling much more tired than usual even though I have been going to bed early. I woke up one night feeling really sick wasn't actually sick and it passed after an hour or so . I felt abit better then the last couple of days I've been suffering from an upset stomach woke up and went to the toilet to find i had diarrhoea. Don't know what's going on ? Does it sound like a winter bug or am I just run down ?