I have sufferred from low potassium since I was 19 as well...I am now almost 33. I was wondering more about your situation so maybe I can help. I have been hospitalized three times since November with critical potassium levels of 2.2, 2.4, and 3.4 all taking 8-9 days to stabilize. I have no colon and big chunk of small bowel removed so Ive had more issues since then, but at 19 cardiac arrested from low potassium and barely survived. I waste potassium as well, but more recently it seems mine is also kidney/adrenal related. I am still in process of drs trying to figure things out and they are baffled as well. I am a nurse by trade, but on disability, but if you tell me more maybe I can try and help?