I am perfectly sure keto isn’t for everyone. But I can’t say if it’s for you. 5 weeks time isn’t much and so many things can affect your well-being.
Keto is totally for me but I never felt I would have more energy or clearer mind, they are just common in ketosis but not everyone gets them. Ketosis feels about the same for me. Fat adaptation changed things and that took more than 5 weeks.
Another thing. I felt AWFUL on keto so I quit on the first or second day when I first tried it. I am a hedonist, I don’t suffer willingly. But after a long time on low-carb, keto was easy and nice. If you come from high-carb and not just that but your food items were really bad for you and you have lots of addictions to carby food, I expect a hard time even if keto is for you.
I lost 4lbs water and nothing else in my first 7 weeks. Keto doesn’t guarantee fat-loss. I was hungry and ate a lot, of course I lost nothing (water doesn’t count) but I felt very good. Maybe losing a lot is part of the reason you have little energy, who knows? But maybe it’s just the changes that keto brought, they are serious. Everyone is different, our circumstances are different too, of course we don’t experience the same things. We don’t eat the same either on keto.
If it’s not very bad, be a bit more patient - but I would tweak something regarding my food. Other items, more calories…
I’ve heard someone who was super hungry and unwell keto after months and zillion others who liked keto. It should be rare that keto is bad and a part of the cases surely have some other problems, not ketosis itself. Keto is “too effective” for some people and they are starving, of course they don’t feel well. There are electrolyte problems. Maybe some important nutrient is missing. And some people need a longer time to get used to the changes. A more damaged body probably has more problems…