Dizziness, slow to rapid heart beat, loss of hearing/vision when I stand in line for a long time?

Orthostatic hypotens. Cannot give you a clear answer. You may have BP drop when standing up or you may have severe anemia that is making you faint please get checked.
Difficult question. The syndrome that you are describing has no easy answer. But the combination of rapid heart beat, loss of vision and hearing strongly suggests a vascular etiology for your problem. The possibility of decreased blood flow to the brain requires a thorough cardiac and vascular evaluation. Depending on your age, you should consult a cardiologist.