Abortion is legal in Nebraska, however they are very hostile to it, Colorado and Kansas are nearby if you can't find an abortion in Nebraska.
Here are some clinics I recommend:
https://abortionclinics.org/
https://www.plannedparenthood.org/health-center/nebraska/omaha/68134/northwest-health-center-2447-90380?utm_campaign=northwest-health-center&utm_medium=organic&utm_source=local-listing
https://www.plannedparenthood.org/health-center/nebraska/lincoln/68516/lincoln-south-health-center-4062-90380?utm_campaign=lincoln-south-health-center&utm_medium=organic&utm_source=local-listing