The answer to your question is that hypokalemia does not cause damage to kidneys, but can cause a slight elevation in blood pressure, but there can be other complications too, for example: mild hypokalemia is often without any symptoms, although, as I've said, it may cause a small rise in blood pressure, and can occasionally provoke cardiac arrhythmias!!
Moderate hypokalemia can cause muscular weakness, myalgia, (muscle pain) and even muscle cramps. Are you experiencing any of these symptoms?
However, hypokalemia CAN be caused by prolonged fasting: in most people, after three weeks of fasting, blood serum potassium levels will decline to below 3.0 mM and can result in severe hypokalemia.
To err on the safe side, and as long as your readings are accurate, I would break my own fast for at least an equal number of days, and concentrate on rebuilding your electrolyte levels with a good quality diet, prior to commencing another fast to complete the work of detox.
Adhere to an Elimination Diet post-fast, to continue the work of detoxing.