I seem to have plateaued my weight .
I am thinking of trying whey protein as a substitute for breakfast which is also low carb .Will this help?
If you're OK with that, try intermittent fasting, skip breakfast and sometimes lunch as well.
Cycle through your macro-nutrients (sometimes low carb high fat, other times high carb low fat). If you're diabetic or have any intolerance of some kind, talk to someone knowledgeable.
About the whey subs: why replace real foods with a powder ?
My understanding is that powdered and liquid food aren't a great idea for people trying to lean out. You can read about a mouse experiment involving powdered food here: The Calorie Paradox: Did Four Rice Chex Make America Fat? (Part II of “There Is No Such Thing As A Calorie”) - GNOLLS.ORG
(Warning: Post contains an image of an exceptionally large person in their underwear.)