6 week old growth spurt?

Is there a growth spurt at 6 weeks typically?  My little one turned 6 weeks yesterday and for the last three nights has been sleeping through the night (yay!). A lot of that (i think) can be attributed to her being super hungry at night and eating closer together--we formula feed. She will eat 5oz around 5pm and then want 3-5 more at 730pm!  I just feel like that's so much for her little tummy!  Curious if that's normal? She'll take a little cat nap after the last feeding and then really pass out from 10:30pm-6am.