What step am I on?

I had been doing pretty good since beginning the program in November with about 5 weeks on Step three. Then BAM I went on a 3 day sugar bender. All day for 72 hours. I haven't done that for years. I reviewed my journal and could not pick up any physical clues. Mental yes. I was feeling depressed and wanted an escape, but even that went away the few days before the binge. This despite adding extra protein at breakfast and the browns at night (which were missing). Maybe I was having a hard time feeling "steady"? Not a clue what premeditated this...

Of course I am a mess and am full of self loathing, etc. So where do I pick up the pieces? Go back to step 1 or just jump in and get back on step 3 where I was/am?

Thanks
Jeffrey