My 5 months baby just fall down from the bed. He cry so loud and I pick him up. He looks fine now, can play and laugh. What should I look out for? Vomiting?

under 6 months, he needs to be admitted to hospital for 24 hr monitoring. every hr, they will check for blood pressure, dilation of pupil etc. we rushed my 4 mths old to kkh immediately & doc said hospitalisation for monitoring as under 6 mths. pls send to hospital for check just to be sure.