Early weight loss is not "real" weight loss as it is because of less food inside your body and some initial fluid loss. If you statred eating again it would go right back on.
So you should not expect this large weight loss to continue and even 2-3 lbs a week way be optimistic.
It may be more like 1-2 lbs a week, and some weeks you may not lose anything, so dont become disheartened if one week you dont lose weight.
Weight can take a long time to put on, normally years, so it can take many months or years to lose it.