Don't beat yourself up too bad over the weekend slip. It happens! Sounds like you have a good plan and are focusing on carrying it out - be strong! It took me a while to cut out the smokes when I quit but it does get easier. I don't think the craving ever goes fully away - almost 5 years since my last one and still I find sometimes I get the odd random craving but it lasts a few seconds and then it's gone again. 99.9% of the time I don't even miss the damn things!
I think everyone has a slip in their change to the PB lifestyle, at least everyone I know or have read their journals on here and all of them, myself included, feel like total crap after. Maybe it is just the subconscious need to really see how much your body has changed than makes us do it. I don't know but once or twice is enough for most people. Hang in their - the tough stretches really do get less and less.
“There are only two options regarding commitment, You’re either in or your out. There’s no such thing as life in between.” – Anonymous
"Das Beste oder nichts" - Gottlieb Wilhelm Daimler