Enjoy it whilst it lasts!! all 3 of my babies slept between 10 and 12 hrs a night between the ages of 2 weeks until around 12 - 15 weeks of age. Then they started waking .........until they were much older!

You may be lucky that she will continue to sleep long periods or she may start waking (which is quite normal). I would never wake a healthy sleeping baby. Enjoy the rest.