I know how you feel!! I have been on 35% hydrogen peroxide therapy for almost 2 years now, and sometimes, on an empty stomach I have felt like you did. This H202 therapy is tough on the stomach, but does a world of wonderful things to it. It will not harm you at 3% (from the info I have read up on), and you did the right thing to dilute with lots of water. Some say, the oxygen gets to the ends of your fingertips within 13 seconds - giving life giving oxygen all over!!! It is said that it stays in your body for over an hour, some say only 30 minutes. If you want to learn more, get Ed McCabe's book called "Flood your body with oxygen". It is currently in print. The best of his books, is out of print, but available through the internet called "Oxygen Therapies". LOTS of good info there! Good luck!!