Sorry you feel blechy.. LOL
That's actually a good thing, because if you didn't feel that way, you'd just let yourself continue to eat this way always. At least you know you don't like that bad overfull feeling. Good feedback I'd say
Try not to think about "getting through to next week" because the idea that you can't do it without overdoing S days in order to be successful during N days is not true, and will probably ruin your real enjoyment of your S's, and just perpetuate the whole cycle of overdoing them for the sake of "getting through"
Just focus on really truly *enjoying* them.. If you overdo it every now and then, just try to listen more carefully to whether you are truly enjoying them next time round.
Me and my Son made yesterday afternoon an S day for us cos it was first day off of his camp program and we decided to take a nice trip out to a waterfront area where they have little ice cream shops and little fries and burgers places.. But we found that some of the food wasn't so great and decided to dump half of it, and then each of us got ice cream and the portions were too big and after eating a little more than half we both tossed the rest after feeling very full. So that was a nice triumph, because not so long ago, we would just plow through all of it and then feel bad afterwards. If you focus on really enjoying your S's you will be more likely to stop yourself before you really go overboard. I'd also suggest, not having too many S's on an empty stomach but rather after a small meal, to keep you from inhaling too much. LOL
Overeating in general is the habit you want to kick, whether it's an S day or not.
Unless it's a sweet S, you can have some of the "snack" foods, if you are dying for them during the week, as long as you have them as part of your meal.
I confess to having chips and salsa as a meal once inna while.
Keep up the good work.
Peace and Love

Debs