If someone sends such a message, (don't call me, I'm going to bed. What was your first reaction?

It depends on who sent this message and the time. Ordinary friends, very normal, without much reaction; Girlfriend, I'll go back and ask "Why?" Supplement: Call directly to ask questions. Why? If she says, don't ask, it's annoying. There must be something. You'd better have two choices: 1, and wait silently. It won't be long before she tells you what it is. Go to her directly, ask her what's on her mind, take her outside for fun, don't tell her anything directly, you can care from the side, and she can say whatever she wants.