Day 4. thanks. I have some pink himalayan salt somewhere, I should be mindful of electrolytes. Last night I watched a video of someone on day 15 of a water fast. Too much maybe?
No clue how many days are too many. If i remember correctly, 3 days was enough to clear up pre-cancerous cells. This channel has great interviews with actual scientists studying fasting -
https://www.youtube.com/user/FoundMyFitness/videosPS - I suggested eating of salt, because of the physically noticeable effect of relief instead of the theoretical need for electrolytes. When you are feeling 'low energy' down a bunch of salt, drink a bunch of water and see how you feel in 20 mins. This, at least, did the trick for me, no promises that it will work for you.
