Hi there. I'm so sorry to hear you are struggling with this fear. I have been fighting with it as well, after having a couple terrifying tragedies over the last couple of years. I wish I could say there was an easy fix, but there isn't. For a long time I also couldn't believe in an afterlife. I tried church and prayer groups, studied different religions to try to find some comfort, and I just couldn't take a blind leap of faith just to appease this fear. But what did finally convince me of an afterlife wasn't religion at all, it was science. I started learning about quantum theory, and more specifically, quantum theories of consciousness. Science is coming to understand that consciousness may not be simply a biproduct of our brains, but actually an active participant in the creation of the world around us, only muted by the filter of our brain. I listened extensively to discussions by a neurosurgeon (Eban Alexander) who should have been dead after his brain was reduced to puss by meningitis. I highly suggest a google search, you may find that there is more to this world than we know and death may not be so final as it seems. I would never expect anyone to take my word for it. What got me to this phase of understanding was not any sort of faith, but following a trail of logic which I invite you to investigate for yourself. Wishing you peace. <3