Growth spurts often occur when baby is 2 or 3 weeks old and again at 6 weeks, 3 months and 6 months. It's common for babies to nurse more often for 2 or 3 days at a time during a growth spurt in order to increase your milk supply. The 6 week growth spurt can often coincide with mom's breasts returning to a normal, less-full feeling as well. If your breasts stop leaking and feel soft again and your baby wants to eat more often, this doesn't necessarily mean you don't have enough milk.
However here are some signs that indicate if you may need some breastfeeding help:
Nursing hurts throughout an entire feed
Your nipples become injured
Your baby can't remain latched or has difficulty latching
Your baby consistently falls asleep or stops nursing immediately after latching
Your baby doesn't have enough wet or soiled diapers each day
Your baby consistently awakens and cries soon after a feeding or is not satisfied after feedings
Your baby isn’t gaining about 1 oz per day for the first 3 months (swipe left to see the WHO growth reference guide from the book, Making More Milk)