I disagree with the advice that you'll get through this. We have no evidence of that right now and that can be a false hope. Being strong or brave does not mean you can't also be completely terrified and scared at the same time. That is fine. That is very human, give yourself permission to be human. God does not promise our earthly lives will continue forever, we all will break down and eventually die. You have the gift of having the reality of your mortality ever present. Often hard to see it as a gift in the moment. That is a hard place to be. Just live today, remember what matters most to you and enjoy today's breath. I haven't been where you are, but I believe in a Savior who absolutely knows what you are going through and can be your strength. May you find strength in Him.