Jo, you've been around long enough to know the answers. It's all about the food, the mix and the quantity. Assuming no carbs are sneaking in and you stay at your lowest possible intake making certain to always stay under 20 net carbs per day the only thing left is portion control.
You lost weight in January (3 pounds), so far none in Feb but didn't gain either...that tells me your body is burning all the fuel you take in and it's enough to sustain your current activity level and metabolism. No more no less.
I want you to cut your serving sizes in half and follow the 15 minute rule. Be honest with yourself and make your normal size plate that you've been eating then take a second plate and remove 1/2 of the food from the first plate and set it aside on the new plate. Eat slowly, include a big glass of water then wait 15 minutes after you're done eating and see how you feel. When I use this technique, 9 times out of 10 I'll find myself totally satisfied and the hunger will be completely gone. It never ceases to amaze me how little food I really need to stay healthy and strong. My personal problem comes in when I want more food because it tastes so darn good....not because I'm still hungry or need the food for health. Maybe you're experiencing the same thing, eating more for the fun of it, not for the need of it...understand? Make sure the foods your eating include dense protein and leafy greens, lay off all the sweets and treats until we get you moving again.
I know it's hard when you sit with the family at dinner and finish your food so quickly when the rest of the family is still eating. I know it can make you feel cheated.... Your game is over and they still get to play
but that's the way it is.
Concentrate on your intake Jo...that's your problem