How To Treat Hit Mediated Left Sided Facial Swelling?

Hi, my name is Jason I am 19 years old, I have been in a little fight with my mate and he had basically punched the left side of my face, on my cheek and temple and eye felt touched mostly, and now there is a swelling on the left temple, my left eye feels a bit heavy, and my jaw hurts when I open it to eat something, the temple hurts, also a slight pull in the ear, even when I raise my eyebrows. I feel tired, but maybe the reason is because I slept late because I heard you should not sleep for a few hours if you get hit in the head. What do I do? it has given me a slight headache also. This happened last night and after 2-3 hrs I fell asleep. this happened at around 4.30am. Thank You.