Three short lines, and almost all the meaning sits in what isn't said. The speaker tells us they'll get their check next week, which sounds like a casual remark. But people don't usually announce this unless something is pressing. Judging by the wording, the speaker may be putting off a bill, an apology, a request for money, or simply reassuring themselves that things will be fine soon.
The feeling underneath seems to be a mix of patience and strain. "Next week" suggests the money isn't here yet, so there's a gap to get through, and the speaker is holding on until it closes. The tone is flat and matter-of-fact, with no complaint, which can make the worry feel even heavier. The tiny size of the poem helps too: the lines are thin and spare, like a life stretched between paydays. The mood is quiet, tight, and a little hopeful, the way it feels to wait for relief you're fairly sure will come.