Definitely don't beat yourself up over this ... tis another experience to learn from and "go from there".
If you can, think back and see what was going on when you had the subway and cooked potato. Were you out and really hungry; were you feeling deprived; were you stressed out about something; were you really busy and didn't have anything else with you; were you feeling anxious, or bummed, or annoyed with something or someone ...
If you can clarify the emotions and situation you were in at the time, you can logically look at the actions and say "okay, I was feeling 'whatever'. So next time I'm feeling 'whatever', I'll make a better choice. It's okay.
Then ... Pat yourself on the back for doing such a great job on all the gazillion other things you ate lately that ARE raw ... focus on how good you feel about THAT ... and move on.
Cheers
Terry
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Energy Healing Practitioner
Organizer - Raw Vegan Community Meetup Group (St. Louis)