My 6 week old baby has been sleeping the whole day , only wakes up for feeding. Should I wake her up in the day so that she can sleep at night?

Babies at this age sleep in 2-to 4-hour intervals, waking up to eat. Hence it is normal for your baby to sleep the whole day, only wakes up for feeding. There is no need to wake baby in the day so that she can sleep better at night. You can refer to this link for more information on baby sleep chart by age. http://www.babycentre.co.uk/a7645/how-much-sleep-does-your-baby-need