
Why can't she have children? Did she hurt herself or was she born without the ability to?

Spoiler of the novel read on your risk
No, when she had his first period (didn’t know about it) use a special plant/flower that stopped the bleeding and she uses it for a long period of time until she didn’t have more period. That’s why she says she can’t have children. In the dream she saw of her future, the doctors didn’t know how to cure it. Until one traveler doctor give her a cure.
She still can have children but she need to drink a special medicine

Time to throw the whole mans away! Just plain out run away from him! I don't get why MC just doesn't go to a trade school and get a job as the people that change the power cords above the city! I forgot what they're called, but they make good money since they're basically risking their lives. Maybe he doesn't have enough time but if he's survived this long, I'd say he'd stand a chance
I have a kitten, I'm not ready for my child to find someone, turn into a human, and lose their innocence