Dreaming that reality comes apart, or that you lose your mind, is read as a fear of losing your bearings in a confusing time. Such a dream is symbolic and says nothing about your health.
Where in your waking life have you met something like this lately?
My Cosmic Code has a private dream journal. Write a dream down and the app picks out the symbols in it, shows what dream books say about them and, over time, which words recur across your entries. The journal is stored on your device only.