What does low blood pressure feel like to you? What emotions do you experience?

My 7 yr old son was recently diagnosed with POTS. He gets extremely low blood pressure and I only started tracking it because I noticed him doing things that seemed “off.” Starting fights/arguments, spinning around, total lack of concentration. I think it’s triggered by his tachycardia. My son is too little to accurately describe his symptoms.

So I’m wondering… What does low blood pressure feel like for you? Is it like nausea? Anxiety? Agitation? Fatigue? Is it painful? Does it linger?