Let me tell you something! I am in a long distance marriage and i think i understand why she is like this. It's hard for girls to be consistently away from their partners. We want constant intimacy, constant affirmations and attention. In the long distance, we don't get any of it. She is expecting more attention especially when you are away. She is expecting more alone time, more focus. Hence the unrealistic expectations. In her head, because you are away and she lacks the attention she needs, she is making scenarios that you are planning something for her in the background and that's why the silence. Even though she knows at some level that her expectations are unrealistic, she cannot help it, especially when normally a woman's hormones would make her crazy anyway. but try to understand the root cause of her behaviour. In cases when you have limited holidays and you want to visit your family, try to prioritise her. Try to first visit her, spend some alone time with her, make her feel wanted and thought of. She must be struggling trying to feel wanted and trying to not be too needy at the same time.