Feeling sadness and becoming emotional when thinking about the aging and mortality of loved ones, especially parents, is entirely normal and understandable. It's a common human experience to be deeply attached to our parents and to feel a sense of loss or grief when we realize that they won't be with us forever. It shows that you have a deep emotional connection with them, and it's entirely natural to be concerned about their well-being and future.
However, if these feelings of sadness and crying every night are significantly impacting your daily life, causing excessive distress, or leading to difficulties in functioning, it might be worth considering talking to a mental health professional. They can help you process these emotions and provide coping strategies to manage your feelings in a healthier way.
Remember that everyone copes with emotions differently, and there's no specific timeline or right way to process these feelings. It's okay to cry and express your emotions, but if it starts to affect your overall well-being, seeking support is a valid and helpful option.
In the meantime, consider discussing your feelings with someone you trust, such as a friend or family member, who can offer emotional support. Engaging in self-care practices and focusing on making the most of the time you have with your parents can also be beneficial. Cherishing and creating positive memories together can help alleviate some of the sadness and make the most of your time with them.