wateroflife
Stop the fast as you have now anyway and eat until you can fast again. Maybe you have to go one day more each time, it definitely does get easier the more you do it and keep taking UT in the meantime.
I began with 24 hrs (wimp), then 2 days (still a wimp), then 3 days which was difficult with aching teeth, irritability, anger, then 6 days which was good, then 10 days, then 13 days, then 14 days (I think that is accurate but you get the picture). From 2 days to 10 days was over a period of about 10-15 years.
I never had my urine taste worse once I started. Something happened to you and I would say as you did - healing crisis.
Stop, recuperate and do it again even if it is for the same length of time.