One possibility is that in the fanfiction, she might be in a situation where she has cut herself off from her friends for some noble reason. Maybe she wants to protect them from some dark magic that she believes will target her during childbirth. Another reason could be that she's on a secret mission and has no choice but to be alone when she gives birth.
Snape would probably use his knowledge of potions. He might have brewed a special pain - relieving potion in advance. He would also use his Occlumency skills to try and block out some of the pain mentally. Since he is a strong - willed character, he would grit his teeth and endure it as best he could while focusing on the task at hand, which is giving birth safely.
One possible plot could be that Snape discovers he has a unique magical ability that allows him to carry a child. He might keep it a secret from everyone in Hogwarts due to fear of ridicule. As he nears the time of giving birth, he would have to find a secluded place within the castle or in the Forbidden Forest. He would endure the pain alone, using his own potions and magic to ease the process as much as possible.
It could be that the father is an unknown wizard who Harry had a brief encounter with. Maybe it was a one - time magical connection that led to the pregnancy.
One possible plotline could be that Harry discovers he has a unique magical ability that allows him to give birth, and he has to go through the process alone in a secret place to protect his unborn child from dark forces. Another could be that he is magically cursed to give birth alone as part of a villain's revenge plot.
One possible plot twist could be that Bella discovers a hidden power within herself during the birth. For example, she might be able to communicate with the baby in a telepathic way, which gives her the strength to endure the pain alone. Another twist could be that there are unexpected visitors who watch from a distance but choose not to interfere, adding an element of mystery to the story.
Ron is often involved. He's Hermione's husband in many fanfictions, so he'd be there to support her during the birth. Harry might also be present, as he's their close friend. He could be the one to ensure their safety during this vulnerable time. Ginny could be another character, perhaps helping Hermione through the labor process, offering her the kind of female support that's important in such a situation.
It could be a story where a magical accident causes Severus and Hermione to be linked in a way that leads to them having a child. For example, a spell gone wrong during an experiment. Their journey would be about learning to co - exist and care for the new life. They might face judgment from others like Harry and Ron at first, but over time, their friends come to accept their relationship as they see how much they love each other and their child.
A common storyline in such fanfiction is Hermione giving birth in a time when there are new threats emerging in the wizarding world. It could be a new dark wizard or a powerful and dangerous magical creature. The birth of her child then sets off a chain of events that lead to the discovery of new spells or magical artifacts that can help combat these threats. Additionally, some fanfictions focus on how Hermione manages her career as a brilliant witch while also being a new mother, showing her strength and determination in both aspects of her life.
Bella might cope with the pain by focusing on her love for the baby. She could keep repeating positive thoughts about the future with her child in her mind, which helps her to block out the physical pain to some extent.