Ah.. could be a few things!
I have an almost 3 month old.. fussiness at this age could be..
- teething.. yes it can happen this early!
- gas, constipation
- overly tired from being over stimulated
- starting to become more aware of things and what they want
- starting to be choosy at how they nap or go to sleep..
- going through a growth spurt
These are some common ones!