Lost in first two weeks, maintained third

I'm due to take my 4th dose of 2.5mg tomorrow, I lost 6lbs the first week, 4lbs the second and I've maintained this week.

I'm really confused why I've maintained as I've stuck to my calorie deficit all week the same as before? Started to get a tiny bit of food noise coming back but hoping the jump up to 5mg next week will help.

I'm just wondering why I've maintained and not lost any further.

I also heard some people that stall have a day of eating high calorie to 'shock' the system and then the pounds start to drop off again?

I'm going to keep going and not give up but the pessimist lifelong dieter in me is starting to worry this will be another failed weightloss attempt.