Hello, Around 2 And A Half Month's Ago I Was

Hello, around 2 and a half month's ago I was out with my friend's and had a few drink's. Someone started to argue with me and I got punched a few times, I assume it was the back of my head due to it being rather painful to touch or even when I lay down in bed. This pain lasted around a week or 2. Didn't really have any major symptom's like a severe headache or that, although my nose was running for a few day's (not long after the incident). I have been to my local doctor's for a check up and (no scan's), and I was sent home. I forgot to mention about my nose running as I never knew this could have been a CSF leak. I am constantly worried in case in actually was, and that it may lead to an infection in my brain. I have been okay ever since the incident