I went through the exact same process - I was overcome by a fear of death.
Give it time - you will adapt.
Remind yourself that you are now dealing with the facts of the matter and not the WT lies.
Also - because the WT had a lot wrong - does not mean that there is no hope.
I for one have maintained a strong belief in God and that we can face the future with confidence.
Whatever you decide to believe the key I suppose is this - do not let the future (that has'nt happened yet) take away your joy today. Their is so much to live for.......