true... my brother has had his nose cauterized 3times now, has lots of nosebleeds. It could also be partly to do with stress... but I think it's best to go see a doctor about it... the only thing is it's unlikely they'll be able to get it sorted before you finish your mocks because they may refer you to an ear, nose and throat specialist.

Hope the exams go well.
Take care,
Molly