Well, it would surely change her relationship with Finn. If he's the father, they might have to grow up really fast and deal with adult responsibilities. Their relationship could become more serious and they'd have to support each other through the pregnancy. With her friends in the Glee club, like Kurt, he might be super protective and offer fashion advice for maternity wear. Mercedes could be there to give her emotional support and advice on how to stay strong during the pregnancy.
It could lead to a major shift in the story and dynamics among the characters. Maybe the other characters would struggle to cope with the loss and it could change the entire tone of the fanfiction.
There are many possible fanfictions on this topic. One could be where Rachel is bullied for her over - the - top ambitions in the Glee club. Maybe some of the other members are jealous of the attention she gets from the teacher and start to spread rumors about her, which makes her feel isolated.
One possible fanfiction could be about how Rachel deals with her pregnancy while still trying to pursue her dreams in the Glee club. Maybe she has to balance rehearsals and performances with doctor appointments and the physical changes she's going through.
One great fanfiction about Puck and Rachel being pregnant in Glee could be 'A New Beginning'. It focuses on how they deal with the unexpected pregnancy and the reactions from their friends and families. They face challenges like school and their future dreams, but also find a new level of closeness through it all.
Another option could be Jesse. Their relationship was also quite intense. Jesse has his own ambitions in the world of performing arts, and a pregnancy with Rachel would create a huge conflict for him. He might be torn between his love for Rachel and his career goals, and this could lead to some really dramatic storylines in the fanfiction.
I'm not entirely sure if there is a specific fanfiction with exactly that plot. 'Glee' has a large fanfiction community, and they come up with all sorts of ideas. It's possible that someone has written a story where Rachel is pregnant by Mr. Schuester, but it also might not exist. You could try searching on fanfiction websites to find out for sure.
She could die in a car accident. Maybe she was driving to a big performance and got distracted by thinking about her career and future, and crashed. Another possibility is that she might have some sort of health issue that was never revealed in the show, like a heart condition that suddenly gets worse.
One possible storyline could be how Rachel copes with her pregnancy while still trying to pursue her dreams on the Glee club. Maybe she has to deal with the reactions of her friends and family, like Finn's reaction if he's still in the picture. She might also face challenges from school authorities who might have concerns about a pregnant student being part of the Glee club.
A possible plot is that the pregnancy is a surprise to everyone in the Glee club. Her friends rally around her, some being overly protective while others give her tough love. Rachel could also struggle with the idea of motherhood because she's always been so focused on her own stardom. She might start writing songs about her pregnancy experience, which then become a big hit within the Glee club and even outside.
Their relationship as siblings would likely bring a new level of loyalty to the Glee club. They would support each other more openly, which could inspire other members to be more united. For example, if Rachel was being bullied by a rival group, Puck would be more likely to step in and defend her, setting an example for the others.