If you have gone low carb because of candida infection, you must increase your fat. Going low carb without increasing fat intake (coconut oil, butter, lard / tallow or from fatty meat, olive oil, avocado fat) will make you feel miserable because your are in the "fuel limbo". Unless you're obese and have a lot of fat stored in you, it will really make you feel like crap. The fat adaptation can take a few weeks (4 to 6 on average). Make sure you get your minerals (sodium, potassium, magnesium) during that period. Vit D is also really important.