There could be many interesting fanfiction plots around Dawson being pregnant in 'Chicago Fire'. Maybe it could explore how she balances her job at the firehouse with her pregnancy, the support she gets from her colleagues, and the changes it brings to her relationships.
One possible scenario in such a fanfiction could be that Dawson gets hurt during a rescue operation. Maybe she is trapped under some debris while trying to save a victim in a burning building. Her fellow firefighters then have to race against time to get her out safely.
Another theme is professional growth. Fanfics might show how they learn from each other and improve their skills as firefighters. For example, Casey might teach Dawson a new technique for handling a certain type of fire, and Dawson could share her insights on dealing with victims.
Obviously, Gabby would be one of the main characters. Her partner, whether it's Casey or someone else in the series, would also be a major character. The other firefighters at the firehouse like Boden, Herrmann, and Mouch could play important roles as well. They could be the ones offering support, advice, or just being there for Gabby during her pregnancy.
One storyline could be Dawson having to deal with morning sickness while on duty. She might try to hide it from her colleagues at first but then they find out and offer their support.
The plot might involve Dawson being initially scared to tell Casey about the pregnancy. Once she does, Casey has to deal with his own insecurities about being a father. As the pregnancy progresses, they could face criticism from some people in their lives who think they're too young or not ready. But they stay strong together, with Dawson relying on the support of the female firefighters and Casey getting advice from his male colleagues. In the end, they look forward to the birth of their baby with excitement and a bit of nervousness.
Perhaps in the fanfiction, Gabby discovers she's pregnant at a very inconvenient time, like right before a big operation or during a period of high - stress at the firehouse. She has to keep it a secret for a while as she figures out how to break the news. And then she starts making plans for her maternity leave and how the team will function without her, all while experiencing the normal pregnancy symptoms and emotions.
Their relationship will likely become more intimate. Casey will be more protective of Dawson, and they'll have to communicate more about their future plans. They'll be more focused on each other and the baby rather than just their own individual lives.
She could be hurt while responding to a chemical fire. The chemicals could cause burns or respiratory problems for her. Her team would be desperate to get her the proper medical treatment, and there could be a struggle to find the right antidote or treatment method.
One great fanfic could be about Casey and Dawson working together on a particularly difficult rescue mission. They face many challenges and in the process, their bond deepens. Their teamwork and mutual respect shine through as they save lives.