Hi dear, thanks for query. I am sorry  for your sister death and situation you are experiencing. It seems to be that you are facing an anxiety issue and you might haven't coped up with the sisters death or acceptance of the situation. I understand that, coping with loss in relationship is not that easy. But it is not impossible also. Some point of time, you have to understand your priority things in your life. Life involves different roles and responsibilities, try to figure out and think how you will work on that. Take care. Stay positive.