Collapsing or fainting is read as overwhelm — the sense of having carried too much for too long. Tradition takes it as a symbol of needing support, not as a sign about health.
Does the traditional reading fit your dream, or did it mean something else to you?
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.