Why does my week old do this?

Alexis • Im 27, you can call me Lexi 💕 First time mommy to a baby girl 👶🏽🎀 now baby boy 👶🏽💙 Was pregnant with identical twin girls💕 Guardian Angel 👼🏽 4/26/17 Miracle Baby 💕🎀 12/13/17

I was told by a lactation consultant to wake my baby up every 3 hours during the fay and after 11pm to wake her up every 4hours. My friend told me she wakes her daughter up during the day every 3 hours and at night she just lets her sleep till she wakes up and wants it. Since today I feel like my baby has been wanting to eat every 1-2hours. Is she not getting enough to eat? And is it okay to pump now?