Idea One for my Horror Film Trailer

After weeks of thinking about what I am going to do, I have finally come up with an idea for my horror film trailer.
My trailer is about a man and a woman who are continuously trying for a baby. Each time the couple try, Clementine (the woman) has a miscarriage when shes only around 9 days in. Eventually when they both decide that they are going to try for a child one last time as it is making them to sad and unhappy C (Clementines nickname) manages to stay pregnant for longer than she usually can. With this excitement she decides to tell her husband the news that she is still with child.
In the evening they are holding a dinner party in celebration for Max's birthday where they plan on telling their close friends and family.
That afternoon C miscarries as their guests begin to sit down for dinner. Rushing to the toilet with the dreaded heavy feeling in the pit of her stomach she excuses herself to the lavatory where she sits contemplating how she will now tell not only her husband but all of their guests. In the end Clementine doesn't have the heart to tell her husband out of embarrassment and  in fear that she will ruin their marriage. She therefore decides to hold on to the burden.
The following day out of exhaustion and distraught, she picks herself up out of her bed telling herself that everything is going to be fine and that it is normal, convincing both herself and her husband.
C in commitment to her lost children decides to pretend that she is still pregnant but gets paranoid that her husband will grow suspicious so after 9 months of stuffing her dress and sleeping in separate bedroom due to her using the excuse that she has a bad form of morning sickness and getting hot and cold sweats which gives her the opportunity to stuff and mold her dress appropriately.
Her husband tells her one day that he will be going away on a work trip and will not be home for two weeks which Clementine uses to her advantage, faking going into labor and giving birth at home. However their was one thing missing from her carefully depicted plan. The baby. That evening C goes into the Hospital in the next town and kidnaps a child from the baby ward returning home with her new baby.
When her husband returns she greets him babe in arm and makes him believe it is his.

I have decided to call this film : 9 days