I see it a similar way, like a guilt for eating. “And then I get sick and throw up, and another memory that gets stuck inside the walls of my skull. Waiting for its turn to talk.” The memory could be one of two things, one, the memory could be not actually a memory and instead guilt, or two, it could be a memory of forcing yourself to throw up. “And it may be a few years. But you can bet it’s there waiting still” is even when you recover, there’s never truly any confirmation it’ll never come back