Up your calories a bit, make sure you're getting enough protein and drink lots more water.
I wouldn't say I had fatigue, but was definitely more easily tired within 2 weeks of starting. Fwiw I started on spiro & E at the same time.
The body adjusts, and these feelings should pass if your diet is good.
You're sending your body into puberty, so try to visualize how a healthy teenager eats

. Well, maybe tone it down a touch if you're older, but know that the body requires energy to facilitate change
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