It sounds to me like something more than your almost fall is at play. I would not be surprised your last adjustment caused some inflammation. C-1 is very difficult to diagnose and more difficult to coax into position without inducing trauma.

What did she do to diagnose that your C-1 was shifted pretty badly ?

Keep in mind that a chiropractic adjustment is not a fix. It only helps your body respond better to good health and posture discipline.

You list general symptoms. I don't see a pattern in them. Many of them can be caused by concussion and/or anxiety. Focusing on them can make a minor symptom much worse. Thinking a chiro adjust will be a fix suggests you are expecting too much.

How has driving been difficult ?
How do you know your short term memory is not there ?