Dear, everyone will face death sooner or later and everyone could become sick. Spend time with your mom and nana and show your love. Remind yourself, life can be short we may die tomorrow. But this does not matter. We only need to spend each second on meaningful thing. This will be enough. Work hard on studies and work. Do things you love. Spend time finding your true love. Live your life to the fullest. I understand it is difficult to stay positive when your beloved ones are sick. But it is really important to stay positive so that your beloved can receive positive energy from you. Exercise on a regular basis to stay positive!