What I do if I have overdone the carbs is simply to cut out carbs for the rest of the day, but you've a pretty good day planned, so I wouldn't worry about it.. Maybe use olive oil or mayo instead of the ranch dressing, if it's a regular one.
Peanuts are one of those foods which probably incline people to binge. Some people are OK with legumes, and others find they stall them. It depends on your individual response, but it's still a lot better than if you binged on real bread, so don't beat yourself up too much.
I am careful about making batches of anything. And I don't tend to do baking, which tends to be carb substitute foods. In my house, we concentrate on soups, stew, main meal items, and we make simple single portion desserts using berries, seeds, nuts and cream etc. Having said that we tried making flax bread once, and we let it cool, sliced it and froze it in single slices. It lasted ages. It wasn't too moreish (I think that was down to it not being very salty), plus it was very filling. I find, however, that breaking the habit of eating without bread is the easiest route to long-term success. I always feel that if people get used to substitute foods which they have to bake, then as soon as real life problems or time constrictions hit, they'll revert to eating the real thing. If you change your eating habits for other quick and tasty foods, then you're more likely to stay on the diet however little time you have to cook. Simple stuff like egg mayonnaise, soups, curries, prawn cocktail and simple berry desserts can all be thrown together in minutes.
Do try making the sandwiches with lettuce instead of bread. I never tried it before this summer, but I love summer barbecue sausages, lettuce and mustard on bread. I tried having the sausage and mustard wrapped in the lettuce instead, and it was so much nicer than in the bread! So much tastier.
As far as any bread you eat in future, perhaps you might be better to try to heap on lettuce, cucumber, mayonnaise and other stuff to bulk it out, so you're too full to want a second helping.
Anyway, I don't think you need to worry about your peanut bread. I ate a ton of peanuts not so long ago, and it didn't make any difference to my weight.
P.S. Just a wee point: some people find that fasting leads to binging. It doesn't suit everyone. If you're new to low-carb, you should give yourself time to convert to fat-burning before you consider fasting. This will take at least several weeks on an optimal low-carb diet. Also, low-carb works quite well on it's own without the need to fast, so if you're new to low-carb, you could consider doing a normal low-carb diet for a while to see how you get on with it first.
Why don't you take a look at Dr. Atkins food lists for the induction period of the diet and start there. Using his suggestions, you can gradually work your way up to increasingly carby choices and find out what works for you. The Atkins diet is a great diet. I bought 'Dr. Atkins' New Diet Revolution', and it changed my life. Using his lists, peanuts wouldn't be added in for weeks or months, and grapes wouldn't really be eaten until you were close to goal, because they're too high in sugar.
You're doing great though, so don't be hard on yourself. One of the forum members, Lisa, has the mantra "Progress, not perfection" as her signature, and it's apt for your situation today.
Have a great day.