20g carbs is right in borderline keto territory if you're not doing MCTs and ketogenic aminos. You might be stuck in perpetual "almost keto", which is a bad place to be because your body never fully adapts.
My advice: either go fully keto or up your carbs. Don't be stuck in the middle.
The Science Behind The “Low Carb Flu”, and How To Regain Your Metabolic Flexibility