There are various strategies but, unless I'm mistaken, you've not been posting your menus so it's difficult to advise what to change...
Care to go to the menu thread and put a few days' menus up for perusal?
As you probably know, I've been coached on the official French site and he says not to worry unduly about "stagnation" until 10 days of no loss... but I know how frustrating it can be well before that...
Many factors, other than food, can of course affect our losses too (cycle, transit, water retention, eating too salty food...)...