You are worried that your consciousness will come to an end. This assumes that you are identified with your consciousness; that there is some thing that you are; that it is your consciousness, and it will end.
Here is another way of looking at it.
There is a process and one of the results of the process is your identification with your current consciousness and its fear of extinction. It didn’t have to be that way and it doesn’t have to continue to be that way. The process can unfold in other ways and it is continuing to unfold.
You are not the current state of the process. If you are anything you are where the process is headed.
You are not a complete thing that you worry understandably will end. You are an incomplete process that you could not stop even if you wanted to. The disease is not death, the disease is the notion that you are currently a completed thing that could die.
Why do I think you and I are a process that is unfolding rather than a thing?
We do not own or control or thoughts or emotions or feelings. They unfold whether we like them or not.
We do not have our identities given to us but assert them in every moment.
We feel radically incomplete. Our nature is yearning and love and need, not self-containment.
Every day we fall asleep and wake up with a new day.
Every moment we forget so much and fail to understand so much.
We are much more failure, brokenness, and striving than we are completeness and success.
Death is our friend. Every moment we are letting go of everything that doesn’t belong to us any more so we can receive the new and become what we are.
We don’t need to fear death because we have not yet been born.