Suggest Treatment For Nose Bleed And Tenderness On Head After Head Injury

My 7 yr old son ran into a metal pole, he started to cry and said his head hurts. About 10 mins after his nose started to bleed. It wasn't a lot but it did stream about 3 times. Now 4 hrs later, He doesn't have a headache, not dizzy, ate normally and is pretty happy except that where he hit his head hurts when touch. I need to add two things. My son also said that there was clear snot coming out of nose along with the blood. However I'm unaware if the clear fluid was just from crying or was it brain fluid? I'm unaware because I wasn't there at the time of injury. It happened on school playground. I will take him in to see his Dr. but I would like to know if I need to take him to emergency room now or wait until next day to see his Dr. Thank you.