okay first of all, as other people have said, killing yourself, don't be so dramatic and inconsiderate to people who are in that bad a place. You missed exams, just email the uni and examiners and show them the email from your tutor. They will probably ask you to attend a hearing to discuss if you had a reason. If you get a drs note then there is really a very small chance that they will argue. It may help if you say that you had breathing difficulties due to the cold as it is easy to struggle with lung infections around that time. But do not worry they will do everything they can to help you and if it is your tutors fault then you can resit them, which is more than some people get.