How does the following paragraph read to you? Is the order logical? Smooth? Does it feel polished?
"I'm sorry," Amy said. "I'm just not ready."
Her hand trembled as she stared down at the small, black jeweler's box.
Her mind raced through her now-familiar list of marriage pros and cons.
There are guidelines to follow when writing action - reaction so sequences are logical and smooth. Evan Marshall simplifies it to F-A-D = feelings/thoughts, action, dialogue.
A heroine's feelings or thoughts come first. This may need a paragraph or a page, or she may have a split second flash.
Then she reacts to what she has felt (or thought) with a physical action. She freezes. She smiles. She looks around frantically. She throws her arms around her lover's neck. The action is justified by her just-stated inner state.
Then she speaks. What she says will advance the story because it will invite a response reaction from whoever is in the scene with her.
Based on F-A-D, the opening pararaph would read:
As she stared down at the small, black jeweler's box, Amy's mind raced through her now-familiar list of pros and cons. Her hand trembled. "I'm sorry. I'm just not ready."