help ease my mind or something.! 😞

My son hit his head/forehead against the corner of a coffee table. It hit pretty hard. And now he wants to sleep. This is usually his nap time but it was pretty easy to get him to sleep and usually it isn't. I was just rocking him and trying to soothe him. He hit his head maybe 20-30 mins ago. He's getting mad because I won't let him sleep. But he ended up falling asleep anyways. He's 8 months old. 😭😞