I go through the "keto" diet quite regularly myself dude.....its different for all people.... trust me, it gets better. Like the others said, you have to up your protein and good fats and oils to give you the energy and balance that your body is missing from carbs.
I actually go alot lower myself, at only 30 grams of carbs for the WHOLE day....for weeks at a time before I have a big "carb day". There are ALOT of great articles that CT has offered on the subject, and alot of good "tricks" to try out, (like the whole apple cidar vinegar/Cinnamon supplement at mealtimes, testing your metabolism with daily morning body temp test, to see when you need to carb up during ketosis, etc...).
I've tried them all and came up with my own system for it...it took me a few weeks of trial and error, but I'm now sitting good with it.
CT has also mentioned it can take 10-14 days to become fully "fat adapted" when going low on carbs to cut BF%. It can be esp crazy the first time ya try it.... but stick with it and see what it does to ya.