Need help with a plateau

How long have you been back at logging food and exercising? It's pretty normal to lose quickly in the beginning as small changes in diet and activity level cause a drop in water weight. Now that this period has past, you need to work on losing the fat and that takes a lot more time, not to mention a bit more effort.

One week is not a plateau. As Branstin noted, not seeing a loss for one week could very well be due to normal fluctuations. If you keep doing the same thing, logging consistently and accurately, getting some regular exercise in, drinking plenty of water, etc and don't see a change after another week or two then you may need to switch something up in your plan.

1 week is not a plateau. You won't lose every week.

I have experienced what I thought were plateaus a couple times in the past. I waited it out, stayed the course and in a week or so, all of a sudden pounds came off all at once. It's a common occurance and I've seen it called the "whoosh" effect. If you've worked at this for a month or two and no whoosh, then maybe you need to tweak your program.

Any or all of these things, for starters, may need to be looked at:

1) Exercise calorie burns. The database, the cardio machines at the gym (and my stupid heart rate monitor) can give inaccurate readings. There are are a number of calculators to estimate exercise calories at shapesense.com and elsewhere if you want to compare that to what you've been recording.

2) Net calorie goal. This is based on an estimate of how much a person of your size, age, and gender should burn, but of course everyone is slightly different. Hormonal and medical issues can cause this number not to be right for you. Also, this number changes over time as you lose weight. It needs to be recalculated maybe every 5 pounds or so.

3) Accuracy of food logging. I'm a recent convert to weighing my food and already I've found some significant errors in my logging. There have been some very helpful threads created on this topic by people far more knowledgeable than I, that you should look for.

4) Cheat meals. Some people feel that they are entitled to cheat meals on a weekly basis. I, personally, disagree with this philosophy, but if you do this be sure and log those calories as well and see what effect it's having on your average intake. It's easy to completely eliminate your calorie deficit with a single meal.

5) Self delusion. I actually used to do this. If I'm up in the middle of the night and nibble on leftovers out of the fridge I would tell myself that it's only a bite or so...what can it hurt? That stuff can really add up and easily negate your deficit.

Anyway, for some of us, it's necessary to really tighten up on our numbers, both in and out, to consistently eat at a deficit.