Re: beginning to feel insecure with nursing...
I think a lot of moms who are nursing older toddlers are in the closet about it. Sometimes it's not intentional, but simply a feature of having a toddler: most busy toddlers no longer nurse in public, and most people will assume your child is weaned, so it just stops coming up as a topic of conversation.
Weaning from a paci... I know some people have "bye-bye paci" parties or "plant the paci in the garden" events or "give the pacis to the new baby down the street" ceremonies, in order to make it positive and mark the transition. Then when the kid says "Wah, I want my Nuk!" you can respond "we don't have them anymore, remember? We already had the party!"
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!"