What Could Be Causing My Head Pressure, Stabbing Pains, Popping Sounds, And Fluid-like Sensations Despite A Normal CT Scan?

Hi I been haveing head pressure on my temples and in the back of my head for about 3 weeks with a head ache . And sudden stabbing pains in my head And I been hearing allot of popping /squishing sounds . In my temples and in the back of my head and some times I feel like my brain is shaking/vibrating and when I’ get up from laying down or I suddenly bend over . I feel like fluid swishing / moving in the back of my head . I don’t know if it’s a blood vessel or not .I’ve never herd it before until now . I have been to the er and had a ct scan no contrast done but it came back fine what could be causing it . My symptoms.