God?..

Guys... on a really serious topic, do you think God exists? What truly makes you think so? I'm starting to question my faith. Why do terrible things happen to great people? What does it really mean when people say "it's in God's hands". Or "it'll happen in God's time"? Why not just right now? Why does it matter when? My life is just in a bad place right now. I feel isolated, alone, tired, and it feels so dark. Where is God? I feel like there is not proof he is here or ever has been and as time goes on my thoughts on that get stronger. Why does my grandma have ALS? Why does my aunt have pancreatic cancer? Why am I not getting pregnant? Why does my job make me so unhappy? God controls all that stuff, right?