How long does the "whoosh" take?

I gradually began eating keto this past weekend by bringing my carbs from 100 net carbs down to below 20 net cards the last 3 days. In the past, I have lost weight rather quickly when doing keto. I lose a couple pounds in the first week, and even though it is mostly water weight, it is encouraging. This time however, the scale has not budged. I can tell that my inflammation and bloating has gone down, I am fuller for longer, my armpits STINK, I have keto breath, and my body is going through sugar and carb withdrawals, but the scale doesn't move. I have heard of the "keto whoosh" before, but how long does it take for the scale to move? I weight 300lbs, so its not like I am already thin and don't have much to lose. I am also using an app to track carbs along with calories. What else can I do to make the whoosh happen faster? It is hard to not get discouraged.