I am a new hedgie owner and there will be more advanced advices but I might say they sleep a lot and they sleep during day.
Mine is also almost 3 months old and she sleeps %70, eats %10, runs %10 and poops %7 and just sometimes cuddles %3 hehe. So I believe it is normal.
I would suggest you that during day time don't wake her up for playing. If you wanna bond with her during day, take her and let her sleep on your lap. They are nocturnal and they want to sleep during day. Especially when they are babies.