I initially went in looking for help coping with stress from exwife+custody - its been a fucked up ride. ANyway, BP was high, so they started treating that. Then diagnosed as diabetic. I was sent to a clinical pharmacist to handle that, and he was looking over my bloodwork and saw the low potassium, and thought it might be an aldosterone issue. Aldosterone being a hormone that controls K/Na balance which controls BP.
Anyway, blood tests showed low K, high Na. Further testing showed aldosterone was out of whack. follow up testing confirmed it. CT scan found a tumor. Then a years worth of testing to be sure the thing wasn't a pheochromocytoma - it wasn't. Finally had it excised and have been getting better since.