Survival is a common theme. Given the nature of the character's world, many fanfictions explore how Daryl Hurt copes with difficult survival situations. It could be about finding food, shelter, or dealing with dangerous enemies.
Another theme is the emotional impact on the other characters. His friends worry about him, and there are often scenes of them coming to terms with the possibility of losing him. It shows the strong bonds within the group.
One popular Daryl Dixon hurt fanfiction is 'Bleeding Hearts'. It focuses on Daryl getting injured during a run and the group's struggle to save him. The story is full of emotional moments as the characters deal with the fear of losing him.
Injury and recovery is also a big theme. Since it's 'Daryl hurt' in the prison. He could be dealing with physical wounds from battles outside or inside the prison. This allows for some great moments of vulnerability and growth as he heals. There's also often the theme of found family. He might meet other characters in prison and form a new family unit with them.
You can try some popular fanfiction websites like Archive of Our Own (AO3). It has a large collection of fanfictions from various fandoms, and there's a good chance you'll find Daryl Hurt fanfiction there. Just use the search function on the site.
Some Tumblr blogs are dedicated to sharing and promoting fanfictions. You can search for tags related to Daryl Dixon and hurt, and you might find some great fanfiction recommendations or even the actual stories posted on those blogs.
One great 'Hurt Daryl Dixon fanfiction' story could be 'Surviving the Wounds'. It delves deep into Daryl's character as he recovers from a serious injury. The author does an amazing job of portraying his internal struggle and how he overcomes the physical pain.
I'm not sure there are a lot of positive 'romance' scenarios where one character kidnaps the other in this context. However, in fanfiction, it could be a really twisted take on their relationship. Maybe the writer is exploring a darker side of Daryl's character where he feels compelled to kidnap Rick for some reason like he thinks it's the only way to protect him from a greater danger that Rick doesn't see. But this is quite a departure from their typical relationship in the show.
Obviously, the two Daryls are the main characters. They are the ones at the center of the story, especially since the title implies that they are the ones who are pregnant.
One possible plot could be the two Daryls navigating the challenges of pregnancy together, like dealing with morning sickness and preparing for the baby's arrival. They might also face judgment from others in their community.