No matter how much mindfulness you practice or how much you meditate, having a bad day is normal and can be expected from time to time, especially while undergoing cancer treatment. I can recall some of my peers reaching out for support while they were in the midst of their cancer journey, and they would apologize for being down. I really didn't want anyone to apologize. Every person is entitled to their own feelings. I even found a cute line of cards that supports that idea and would send them out for a unique way to offer support and encouragement. Sometimes we need to stop and meet ourselves where we are at, so we can collect our feelings and honor sadness, fear, anger and whatever else might be coming up.
While many of us may share the same or a similar diagnosis, how an individual manages a situation is individualized. There is always a difference in support levels and other factors which might be going on in an individual's life, making our experiences unique. I personally support individuals needing to find the correct time, place and desire to process or experience their feelings as they identify with them. Maybe it is important to ask yourself what you are feeling and what you need, rather than worry about being judged for what you are feeling. What do you need? After you determine what is it you need to feel or experience, consider honoring that.
Some days might be better spent alone or with friends. Other days you may benefit from resting and getting more sleep. There is certainly something to be said for getting more sleep. It not only helps restore our body, but sometimes what seems like a negative situation doesn't seem so bad when you get a little rest. You can also choose to spend the day with the top down, with the dog, going for a walk with no regard to time, or taking in that tearjerker that helps you get everything out. Whatever it is, ask yourself what you need. With a little caution, know that it may not be a good day to make important decisions, but just focus on the basic elements of self-care.