Hi, I am a 17-years old female and I always feel these liquid sensations moving through my brain. I can hear them and it is like water swishing for about 1-4 seconds. This occurs multiple times a week and I frequently feel a lot of pressure on my head. Occasionally, I will get this sudden cold, tingly, numbing rush that overtakes the left side of my hide. The moving liquid sensations occurs on the right, upper back side of my head. Can you help identify what the issue is?