I've been wondering about caffine actually, I don't drink tea or coffee but I do drink diet coke (as it is usually the only diet soft drink places have

) which has caffine in, I've stopped drinking it ever now just in case it isn't helping, I never drink it in the late evenings though, usually only at lunchtimes when I'm out. I really can't think of what else can be causing it, it's not age as I'm 24, and the only medication I take is metformin and pioglitazone, neither of which cause this as far as I know.
I do drink more than some people (not alcohol), but not an excessive amount, 2-3 litres I'd guess.
Exam isn't till January so not that worried about it yet

plus I told the university I have diabetes, so they said they will let me sit near the door + add the time I need to go use the toilet on to the end of the exam if I want + have rest breaks if I'm tired, which is helpful, and means I'm less worried too.
I'm going to ask my doctor about this, see if they can help.