Have experienced all of the above over the past 40 years almost in cycles, but overlapping - complicated by back problems and sciatica. Another factor to consider: what elevation are you? I had been living at 9300 ft elevation in the Rocky Mountains but after 6 yrs of hypoxia, head pressure, numbness, and erratic blood pressure, moved to 5100 ft elevation and was doing much better for a couple of months but am now dealing with pressure, numbness, and fatigue. Had a Stealth Brain Scan this morning (on Easter Sunday!!!) to see what's going on "upstairs."