I just feel generally unwell most of the time but i can't pin point one thing, as every problem i get i think is sometimg major and i will die ?

Feeling ill: It sounds like you may have an underlying mental health issue such as anxiety or depression especially if you have been evaluated by a physician for your complaints and no organic pathology was discovered. If not, you need to get a full evaluation by a doctor. Your anxiety and obsession about dying can become debilitating and may require urgent intervention.