Another possibility is that she tries to understand where Harry is coming from. Despite being hurt, she might use her love for him and her own intelligence to figure out the root of his anger and try to resolve the situation calmly.
Ginny could also be angry right back. She's a strong - willed character. If she feels that Harry's anger is unjustified, she might not take it lying down and confront him about his behavior.
She might be hurt at first. Since she's pregnant, her emotions could be more fragile, and Harry's anger could really sting.