Hey! I know what you went through. Last time I did a 40 day Water Fast I actually passed out and fell. It's normal to pass out or get dizzy during a fast. If you feel like this again it helps to kneel on one knee and close your eyes for a minute or two. Also don't feel regret about your Watermelon serving. Listening to the body is still very important. You can either restart your fast or continue it. One day isn't a sin! Goodluck! =].