Two days after diving into shallow water and hitting my head, clear watery liquid started coming from my nose and running down my throat. It has lessened from yesterday however; this being three days after the incident. I feel no severe headache (aside from a minor ache in the back left of my head which comes on and off) nor pain when sitting upright, however I do feel slightly lethargic. I have experienced some tinnitus, although I have suffered it far before hitting my head. The scar is atop my nose - right between my eyes.

Is this CFS? Does CFS from trauma go away by itself? Should I seek medical consultation? How would this be treated?