So I've been on SB for over 2 months and have felt in control the whole time. I've had no problem staying on plan. If I went off plan, 99% of the time I planned it. For example, I told myself in advance that I could have one piece of cake at my son's bday party. And then I had the one piece and that was that. Or, I would tell myself I could have a meal off plan when we went out to dinner with friends one week, and then I would just have the one meal and be right back on plan the next day; I'd even be excited to get back on plan! Things were going well; I felt good, I was in control, and I was satisfied.
Then this week, I don't know what happened. Well, I kind of do. I had a really low calorie (500 cals) day on Tuesday because I have been calorie cycling, and then I did not plan well on Wednesday. I was in a setting where I did not have access to my normal foods. By the time I went to pick up my kids at my in-law's at 3 o'clock, I hadn't eaten all day. So, basically by Wednesday afternoon, I hadn't really eaten in 2 days, which was NOT my plan. I felt light headed and dizzy and still had to drive my kids home--safely. By that point, I knew I just needed to eat regardless of whether or not the food was SB approved. I grabbed a couple of non-SB snacks and ate, not out of hunger so much but because I felt completely off.
The rest of the day just got worse. I think my blood sugar was completely messed up by that point. I felt sick, nauseous, head-ache, irritable etc...
Thursday I had a normal phase 1 SB day, but I was NOT content; again, I was irritable, nauseous, and basically didn't feel motivated to stay on plan (although I did stay on).
Friday was my Easter baking day and I had already told myself I wasn't going to stress the food since I experiment with new additions and stuff while baking and part of the fun is in tasting new concoctions. Anyway, I felt like crap by the end of my baking marathon. I was probably in sugar shock or something. I had a headache, stomachache, and just felt abnormal...again.
So, today: I have eaten phase 1 SB all day and will NOT be going off at all tomorrow either. But I HATE how I feel. I'm irritable--again, with that same headache and stomachache. I know by this point my body is probably all confused and whatnot. And for the first time since beginning SB, I'm not excited about being on plan. I hate that this thought is even in my mind. I have been dedicated and motivated for over 2 months. I have been enjoying being in control and making healthful choices. I have been losing weight steadily and healthfully. I've realized the whole extreme calorie staggering probably wasn't such a hot idea. If I hadn't eaten so little on Tuesday, I wouldn't have felt so horrible by Wednesday afternoon.
So, basically I guess I'm just wondering if anyone else has been in a semi-similar situation. Have you lost motivation or felt side-tracked at all along the way, and how did you rededicate yourself? Thanks, and I apologize for the length of this rant.

It sounds like you're not feeling well at all. Is there any possibility that you've got a bit of a bug in addition to all that happened with your plan since Tuesday? Apart from that, I think we've all had moments and days where things just aren't right. I've had them, too.
But...You can do it!! Focus on all the times where you were in full control of food and chose not to eat something. How good did that feel?! You weren't able to lose almost 20 lbs without making good choices!! You are the boss of food and right now, you are taking names! It is only failure if you give up...and you aren't giving up!