"Cluster Feeding" is NORMAL in an infant. It means they nurse every hour or less. And you need to feed on demand.
They are changing so much so rapidly.
You need to nurse according to a baby's cues.
Do you have amply breastmilk being produced?
IF you think she is not nursing properly, then see a Lactation Consultant.
Infants, feed often.
It is normal.
Nursing is arduous work.
Supplementing will not change much. Except, it will affect YOUR milk production. And lessen it.
I would see a Lactation Consultant and see if your baby is latching on, properly.
But, both my kids as babies, had HUGE appetites and they nursed... all.the.time, day and night.
My Husband would go to work in the morning, seeing me sitting there nursing. When he came home from work, there I was, sitting there nursing. He'd tell me "Is that what you do all day, nurse???" And I would say "YES. Just be happy you don't have to do it." But at the same time, he was proud of me, because he knew... nursing is hard and time consuming... but that I was nursing as my kids needed me to. And he's a guy... and he knew this.
Every 3 weeks in an infant is a growth spurt. So 6 weeks is a growth spurt period.
Then at 3 months, 6 months, 9 months and so forth.
When I was nursing my youngest, I just explained to my older child that I had to nurse baby. He can't do it by himself. My daughter understood, I'd have toys for her to play with and me there sitting in the chair nursing.
And no, there is no relaxation time.
But, BOTH my kids, NAPPED at the same time.
But no, there is no relaxation time.
It is busy.