What Causes Clear Fluid Discharge From Nose,dry Throat And Dark Spit?

My nose just started dripping clear fluid (only from 1 side of the nose), the fluid doesn t seem like the normal running nose type, & there s quite a bit of pink color in it. It dripped for about 5 mins & then after I wiped it out it stopped.That happened when I just got home & went upstairs to do some vacuuming, and looking through some bills. There was no pain anywhere around my nose, ears, throat or head, although I noticed something that feel kind of loose behind the side of my nose that dripped when I shaked my head.For the last few days I have been having some kind of a cold, a little coughing particularly just after wake up, also some dark split by then but none in the rest of the day. Throat feels dry and sometimes scratchy. I haven t seen a doctor and only taking ColdFX.Other than allergy, I have no history on any ENT-related or brain diseases, although I have been hearing ringing in my ears for quite a few years already, & the ENT doctor couldn t find anything