I started a grad scheme in late August and as part of it have recently had to complete some tough exams. I took four in three days, along with a few others, and was required to come into work the day after. I am not one for sick days but vomited several times the morning/day after and woke up with a banging headache. I think it was the combination of a prolonged lack of sleep, the stress and anxiety, and not looking after myself during the exams; I had not drunk to celebrate after the exam and came home that day to have an early night; anyway it culminated in me taking a day off sick.
On coming back to work however I have detected a vibe that some people maybe think I was hungover and couldn't be bothered to come into work that day - this really was not the case! I informed my manager about my absence, who accepted it, however the next day he came over and didn't enquire at all about how I felt - it probably didn't help that by this point I was well rested and felt significantly better... I am really paranoid and anxious about it :s