After sitting for an extended period of time I feel as if I have pressure in my head like swimming deep in water, but also feel like the room is spinning. not quite vertigo spin but as if it got any worse I might pass out. I have not passed out and am able to answer and communicate fine in meetings. My ears some times feel like they need to clear. I would relate this to when light is flashing or you are driving down the road and trees are giving off shade causing a spinning in your head. No one has noticed anything different not even my wife except for when I say I need a second I feel weird. Blood pressure is 129/90 pulse 90 a little high but I have been working out and eating better. If I stay moving around all day and active I do not feel this way. I think it is only when I sit down. oxygen blood level is 96%. I have no idea but I started a new job and am afraid of loosing it if I take time off to go to the doctor.