If I understand this correctly, you are saying your brain is hyperactive, which is a result of it using more ketones which is arguably, a better source of fuel than glucose. The brain does still need and use glucose but it can make it in the liver through a process called Gluconeogenesis, as needed, even in the absence of eaten carbohydrates.
Increased brain fuction and better memory can also be benefits of eating low carb. LC has also been known to have improved symptoms from brain diseases like Alzheimers, Parkingsons and Dementia. Brain fog is typically used to describe poor focus, memory or confusion And if that’s the case for you, I would recommend a little coconut oil in your morning coffee as well as cooking with it, at least until your body better adjusts to using ketones efficiently.
Because even veggies produce natural sugars. These sugars are a way lot better for us than processed sugars but they are sugars nonetheless. The good news is if you count net carbs (Total carbs minus the fiber), then 1 cup of cauliflower is only 2.2 carbs toward your daily 20. If you count total, it’s about 5.1 carbs per cup. In the forum here, about 66% of voters use net carbs.
Sounds like you are doing just fine.
Total current weight.
Hope it was delicous.