With so much going on -- a recent death in your family, career exams, and existing mental health issues -- it's vital that you talk to a professional counselor about your level of stress. Make this a priority NOW. It's important that you grieve your grandfather's death but also develop both a short and long-term plan for adapting the best you can to your health issues, including learning positive and productive ways of coping. A professional therapist can help you through this process. In the aftermath of your grandfather's death, also try to stay active and engaged, talking for example with family and others who knew him regarding your feelings and memories. Relatives who miss him too and are hurting like you are can be a source of mutual support. I am sorry for your loss.