Speak now.
Uncommunicated expectations are pre-meditated resentments.
Have you ever noticed that most of the conflicts that arise are the result of undeclared expectations? Each party arrives with clear idea of what they want. And so often do they fail to share those details. This leads to resentment and disappointment.
Thankfully, with a big deep breath and some thinking around your approach and delivery, these conflicts can be pro-actively snubbed before they become an issue.
Who is someone with whom you have regular conflict? What expectation could be shared to make a difference here? How would this information impact your relationship going forward?