Three short lines carry a quiet kind of dread. The speaker describes having once had ways to silence the "voices screaming in my head," which suggests habits, distractions, or comforts that worked well enough to keep painful thoughts at bay. Now those things "no longer work." The poem doesn't say what they were, and that vagueness makes it easier to imagine your own version.
The speaker's feeling seems to be a mix of helplessness and exposure. There is no anger or drama in the phrasing, just a flat, tired statement, as if they are reporting something they have already accepted. The word "somehow" at the start adds confusion, as though the speaker can't say why the old defenses failed.
The mood is bleak but honest. The title "Healing" sits oddly against the content, and it may point to the idea that healing begins when old coping tools break down and the pain can no longer be avoided. That is an inference, but the poem leaves the question open.