Please accept my condolences on the loss of your mother.
Whatever else you do, first be gentle with yourself and don't make any major decisions now. Who knows, the sign you're looking for could actually be pointing right in the direction you are already going, but you won't know that for a while, and if you change jobs in the midst of this life crisis, you'll never
Because of the connection between your area of nursing and the manner of your mother's death, you may one day become a magnificent cardiac nurse who inspires her patients to make the lifestyle changes needed to regain their health; after all, some of the best nurses in any area are those who have intimate personal experience with that particular health issue. I have a friend who for years was a top NICU nurse in a prestigious Eugene hospital, and until she retired last year, she was known throughout the region for her skills and compassionate care. She had lost her second child, born two months premature, to NEC a few months before we started nursing school. She pursued this course because she needed desperately to understand what had happened, and she wanted to save as many babies as she could from going through what hers had. It became her passion.......her mission in life.
Perhaps this will happen for you as well; perhaps not. It's way too soon to tell. Just don't make any snap decisions when your emotions are still so raw from the shock and pain of loss. You already have enough on your plate as it is!