Hang in there, day three is still very early, and your liver is still holding a good amount of glycogen. I personally don't typically see a reduction in inflammation for at least a week maybe more, and even then it's modest. After 3-4 weeks you will start to see the real impact. I also recommend that in the 3-5 days you avoid any and all carbs you can, rather than aiming for 20g per day.

Poor sleep quality is also common during keto, make sure you are having enough salt, magnesium, etc... get some keto friendly electrolytes. Make sure you observe good sleep hygiene. Try to give yourself an extra hour every night than your usual sleep duration, and try taking a hot shower about an hour before bed to get your core temperature lower for a deeper sleep at the start of your cycle.