When you are going through times you are wondering if God is really real you need two things faith and reasons. Sometimes, like when you're going through hard circumstances, you need to have faith that everything will work out and that God is good and loves you. Other times when the question of God being real pops into your head you need to be able to think about why you believe God is real. I think there is absolutely evidence that Jesus lived, was crucified, and resurrected, I think there is a lot more evidence for Christianity than for atheism. When you go through hard times in your faith you need to have answered the deep questions you had about God so that you can have a solid foundation for what you believe. That's why asking hard questions your faith now is so important. If you are struggling with a question now then it might destroy your faith during a hard circumstance. Sometimes looking for answers can be comforting sometimes it's hard work and a lot of useless searches before you find an answer. It's important that your answers aren't just what you want to hear instead of things based on sound logic and knowledge about God.