newborn feeds every 6 hours, normal? :(

(This has been happening since she was born) so my daughter is 2.5 weeks and is exclusively breast fed 110-130ml (3.5oz-4oz). The moment she wakes up she's changed, fed, sometimes changed again, and all that takes 2hours until she falls back to sleep and then she sleeps for 4 to 5 hours, so basically she feeds every 6 hours, is that normal? I keep reading about newborns feeding every 2 to 3hours, so I tried to wake her up 2hours into her sleep but she doesn't want to wake up at all, so I'm not sure if she's taking enough breast milk to grow :(