I am 36 year old female. Overweight with hypertension. Being treated with 2 meds, 1 is also a water pill. Started with dizziness 2 wks ago, now seem to be yawning all the time, unable to get a full breath. had blood tests for heart attack (they were normal), and for blood clots, normal as well. clear chest xray, clear chest catscan. could this be low potassium?