I screwed up today!

so i went 3 days on nothing but water and that was great i was so proud of myself, then i started feeling kind of week as we usually do when we deprieve ourself of food then i made a huge mistake...I accepted a lunch invite and had a sandwhich today ..i was starving so I kind of actually finished the whole thing!!! bread and everything!...I have more energy buut i feel terrible i didnt want to go throw up because im not in favor of mia so instead i choose to just forget about it and fast for 5 days then have about 300 calories then go another 2 days then do the ABC .....oh wish me luck please!!!!