The "silent treatment" means something is wrong and it will not go away by itself.
When a woman stops talking with you, there is usually something on her mind. This can be true for men too, but how they deal with it is different to how women do. When men have an issue they are dealing with, they might not talk about it, but still communicate about everything else, but women tend to go silent on everything. It is important to find out what is wrong and help her sort it out, so first thing to do is ask her. If she replied, "It's nothing," gently let her know that there must be something wrong otherwise she would be acting differently. Be prepared to listen and work with her to sort it out. If it was something you did, apologize to her and ask her how you can make it better.
PMS is not the cause of every mood she has.
PMS is not responsible for all of her bad moods - unless she tells you that it is. If she is upset about something, offer to help or just be a listening ear. Ask her what she needs and if it is something that she wants to deal with herself, give her some space to deal with it.
She does not want you to solve every problem she has.
Men love to solve problems. It is something that is instinctive with men. However when your woman has a problem she does not want you to solve it for her, unless she asks you to. When your woman has a problem, she may just want to talk about it. The best thing you can for her in this situation is to listen. This one can be tough for guys because they are geared to fix things. For men, listening feels like they are doing nothing, but, believe me when I say, you are doing something good, it is just hard to see it.
Choose carefully where you seek relationship advice.
While you might think that her father would know her better than you do, he may not understand her any better than you do. By asking him for advice regarding his little girl, he will only become concerned about why his daughter is upset.
Talk with your woman.
Always keep the lines of communication open between you. When you have something on your mind, talk about it with her. Most problems are easier to deal with when shared with someone. If you keep it to yourself, she will still sense that something is up and may worry that it is more serious than it actually is. When we do not know what we are dealing with, our imaginations can take over. Have you ever noticed that things are never as bad as you thought they would be? Just a word of warning, withholding information deliberately for whatever reason can risk the end of your relationship. Good communication is the key to a successful relationship.