Physically, you can show Betty with dark circles under her eyes, constantly yawning, and her movements being sluggish. For example, when she's walking to school, she might be dragging her feet. Emotionally, she could be short - tempered with her friends and family, snapping at them easily because she's so tired of dealing with everything. You could also have her make mistakes she wouldn't normally make, like misplacing important evidence in a mystery she's solving.
One idea could be that Betty has been overworking herself on a big mystery in Riverdale. She's constantly chasing leads, staying up all night, and it's starting to take a toll on her. Maybe she starts having hallucinations related to the mystery, like seeing suspects everywhere she goes. Another plot could involve Betty being tired of the constant drama in Riverdale. She decides to take a break from all the chaos and goes on a solo trip outside of town, but of course, trouble follows her.
There could be many interesting fanfics on this topic. Maybe it would explore how Betty deals with the pregnancy in the complex world of Riverdale, like how her friends and family react. Archie might be shocked and Jughead could be there to support her in a really unexpected way.
It could also be a plot device to introduce a supernatural element. For example, she could be put into a magical sleep by a villain, and the rest of the story could revolve around her friends trying to wake her up, encountering various challenges and mysteries along the way.
I'm not sure specifically as there could be many different interpretations. It might be a fan - written story about Betty from Riverdale being sick in the first part of the story. Maybe it focuses on how her sickness affects her relationships in Riverdale, like with Jughead or her friends.
The themes usually revolve around loyalty. Archie and Betty are often portrayed as being loyal to each other through thick and thin in fanfics. There's also the theme of self - discovery. As they interact with each other, they learn more about themselves. For instance, Betty might discover a new side of herself because of Archie's influence. Also, the small - town life in Riverdale is a theme. How the town's gossip, traditions, and events affect their relationship is often explored in these fanfics.
The town of Riverdale itself would be in mourning. Betty was always involved in community activities and trying to make the town a better place. Her death could lead to a general sense of hopelessness among the residents. People might start to lose faith in the future of Riverdale and there could be a decline in the community spirit that Betty had worked so hard to build up.
Maybe Betty gets pregnant and it causes a rift between her and Jughead. Jughead is really focused on his writing and his own future and he's not sure if he's ready to be a father. This could lead to a lot of drama and emotional turmoil as Betty tries to convince him that they can make it work and that she needs his support.
Well, perhaps she gets sick because of some sort of environmental factor in Riverdale. It could be related to the polluted river or some toxic gas leak. And this sickness then affects her relationships with Jughead, Archie and Veronica. She might become more withdrawn and they would have to figure out how to help her.
The fanfic could explore how the death affects the younger generation in Riverdale. Maybe the kids at school start to form a support group in Betty's name. Or perhaps there are some who try to follow in Betty's footsteps and continue her work for justice, which would create a new dynamic in the town as they face opposition from those who don't want change.