A few things...

Reading and following PP would be a great idea. You can calculate your minimum daily protein requirement and there are guidelines and suggestions for how to follow the plan re: protein and carbs.

You shouldn't ever have to wonder when you should eat. Eat when you are hungry. If you are drinking enough water, you won't be confusing thirst for hunger.

Go to the Journal section under "S" and start a food journal. Record in it every day without fail.

I love tomatoes too, but if what you've posted any indication of the way you generally eat, you should be eating more greens and green vegetables. Also, you're barely eating enough. This could be the cause of your stall.

You say you are following Atkins, but it is not indicated that you have read Atkins in your profile. Have you?

Karen