Hey, Valerie…sorry to hear about the lack of energy…as others have stated, the first few things to look at are calories and electrolytes. One aspect of the diet I would re-stress, especially if you are starting out with keto and your body fat %'age is on the low side (perhaps below 25%), is that you really have to up your fat consumption (if you think you are eating enough fat, you probably aren’t). If you are NOT consuming enough fat calories and you are in ketosis, you COULD be eating a calorie restricted diet and there are many studies that show that your hormones and mood will be “unhappy” in this state. If you don’t have enough body fat to make up your total calories, then you have to make it up with “plate” fat.
If you have that covered and are still struggling, replay back…next you could experiment with mitochondrial nutrients and supplements…B vitamins, CoQ10, NAD supplements. I got the most noticeable boost in energy with a b-complex and CoQ10.