Finite of Life scares me

I am not religious or spiritual and always considered myself an atheist. The hardest part for me is death.

I'm not sure how to describe my fear but the idea of one day, some unknown day, I won't wake up and it's over. It haunts me at night. Haunts me during the day. Its terrifying to me. Its not that it will hurt. Not that it's done, but things will end for me but the world will keep spining. I'll leave people I care about alone, and sad. They will have to sift through my life and mourn that I'm gone. I will have unfinished goals and projects. I wont know if it meant anything in the long run and I guess I don't want it to be over unless I'm ready.

I'm utterly terrified about this. I don't know how to process this. My therapist tell me spirituality will help but I dont know in what context. The beautiful dream people of with religion is to see those loved ones again. I'm jealous of that, but don't believe it. Ive been told to think about something cosmic, something grander than myself, but that holds no meaning to me in the context of this fear. Even if reincarnation is real, that is the same as death since this life is over. The people, feelings, memories are gone. Its death.

My husband is a nihilist and just says he doesn't think about it. How do you not?

Anyways, sorry for the rambling. I don't know how to process. I know people say enjoy the journey because there will be a destination, but to me that's like taking a walk to the corner store but suddenly sinkhole, and thats your new journeys end. You don't get to the corner store, you don't get to go home. That destination was changed and forced upon you.

But any advice may help, since I don't know many atheist, and those that I do know don't have this dread hanging over them, they just don't think about it.

** TLDR: its not after death I'm afraid of. Its not knowing when and the hurt I'll leave behind to those I care about.