How long do your POTS flare ups last?

I'm on week 2 of a gnarly flare up. I was hospitalized but now am home trying to manage symptoms with meds. They've put me on a heart monitor for 2 weeks, but I can't do this much longer. My body is so exhausted. I've had tachycardia episodes constantly. They're checking me for autoimmune and adrenal gland disorders. But why did it flare up so suddenly and so bad?! Just wanted to know if anyone else had long flare ups. I just want to know when it will end...