Can fluid on the brain cause permanent memory loss?

A couple years ago I got a severe headache that came on suddenly and had many trips to the hospital/dr. After all the trips and lumber punctures I was told I had "fluid on the brain". It seems that ever since I have had an extremely hard time remembering things. My memory just seems to be getting worse to the point that I cannot remember what I wore yesterday or for instance I call and check how much money I have available and when I hang up I have already forgotten. I can remember most important things but am scared that I will continue forgetting things. Does anyone know if this is normal and/or anything that may help.