Re: No Supply?
As long as you are:
1. Feeding on demand
2. Not pregnant or taking a new form of hormonal contraception
3. Seeing sufficient wet diapers
Then you do not have a supply problem.
Babies fuss and increase their nursing frequency for all sorts of reasons. Teething, missing mama, growth spurts, desire to increase your milk supply, preferring a faster flow, preferring a slower flow, ear infections... The list goes on. Best thing you can do is get used to the new normal, nurse as much as possible, and if the fussiness doesn't go away or intensifies, consider the possibility that your baby isn't feeling well and take him in to the doc.
The following are normal with an older baby, and are not a sign of low supply:
-leaking less or not at all
-decreased pump output, if mom is pumping in addition to nursing
-decreased/absent engorgement or feelings of fullness
-decreased/absent letdown sensation
-baby dropping percentiles on the weight-for-age chart (breastfed babies tend to gain weight quickly as newborns and then lean out as they become more active and start putting their calories into action instead of fat).
Coolest thing my big girl said recently: "How can you tell the world is moving when you are standing on it?"
Coolest thing my little girl sang recently: "I love dat one-two pupples!"