Hi, manokat!
I'm familiar with Somersizing, and there is no way to estimate how long weight loss will take with that program. Even if one could estimate, that's just an educated guess.
Also, it's not exactly a "low carb program," as I understand the term. Isn't it a food combining plan? Maybe I'm thinking of an older plan.
But stay with it and see!
I will say that it's likely your weight will not change as fast from here on as it has done in the first week, so don't expect to lose another 5 pounds this week.
Jay