@peach414144 I know it can be terrifying to focus on the possibility of blindness. I wished I had a magic answer for you. Have you discussed your thoughts and feelings with your doctor? Is there a possibility of getting a second opinion from a different eye doctor? There can be many causes for vision loss. VisionAware.Org has some good information that may provide some ideas or help for you.
https://www.visionaware.org/info/your-eye-condition/eye-health/symptoms-of-vision-problems/125