In just five short lines, the speaker describes an intervention that went badly wrong. Other people, whom the poem never names, believed they were protecting the speaker "from myself." But the speaker sees it differently: what they took away was "the only restraint I had." The help, in other words, removed the one thing that was keeping the speaker in check.
The word "now" in the title, and again in the final line, gives the poem a stark sense of the present. The shift from "however" to "but now" feels like a door closing, and the last line, "there is nothing holding me back," lands with ambiguity. It could sound like freedom, or it could sound like danger. The poem doesn't say which, and that uncertainty is what makes the mood so uneasy. The tone is flat and calm on the surface, yet it carries resentment toward those who meant well, and a quiet, unsettling sense that something may now go unchecked.