It depends, why do u believe in life after death but not God? Isn't he the one who created the heavens and the earth? He is letting u live after death but u won't unless u believe in him and love and trust him with all ur heart!
God is real. They found Noah's ark underground frozen same size and shape as it says in bible it's really deep below but they found it so that proves God is real please reconsider and u either believe in God and the afterlife with him in heaven or u r an atheist (believe in no God) be a beleiverrrerrrr
Depending on what else you believe. The general term would be spiritualist. It might be cool to research different faiths and see what's out there: you might just find something you like. And remember, just because you can't see something it doesn't mean it's not real ;)