Four short lines carry a whole story of hurt and recovery. The speaker is looking back at someone else, "your storm," and the storm is clearly a person or a relationship that was turbulent and painful. Even though it has passed, its aftershocks are still there: it "still shook / In my soul." The word "reminisce" is used unusually, as if memory itself were a thing that can rattle you, and that slightly odd phrasing makes the lingering feeling seem raw rather than polished.
Then the poem turns on the word "But." Instead of waiting for the weather to clear or for the other person to change, the speaker learns to "take shelter / In my own heart." The mood moves from unsettled to quietly steady. There is no anger here and no big declaration, just a calm sense of hard-won self-reliance. The speaker doesn't claim the pain is gone, only that they've found somewhere safe to stand while it fades.