Well I can't speak on your situation because I don't know all the details as that's your personal experience. But for me, it was a genuine encounter with God that changed my life forever. I grew up in a Christian house hold as well (baptist) . And yes, I thought just going church, reading the bible every blue moon, and ocassionally praying made me a Christian. What I found out is that I was simply practicing religion. I wasn't really taking in what was being preached, and didn't really know Christ. I acknowledged he existed and believed in what the bible taught, but I wasn't living my life accordingly.
Then I hit rock bottom and during depression and thoughts of suicide that's when things changed. I just remembered the time I nearly drowned at a water park as a kid and seeing that white light with a figured that looked like Jesus standing with his arms open. Then the other numerous times I should have died but didn't leading up to that point. Then I felt this presence unlike anything I felt before. This voice in the back of my mind that was saying I love you and I have a plan for you. And that's how I knew God was very real. And no, I do not have a mental issue nor was I just was imagining things.
Also during my time not really believing in God. I did research into all the scientific theories and while I accepted some elements of them. It just didn't make sense to me that all this just happened by random chance. When I look at all the people, wildlife, planets, landscapes, I see more than just science, but the work of a higher being. And yes, I was aware of the bad things that happen to people as well. Such as starving kids in Africa and why X people died and some didn't. I chalked those things up to us living in an imperfect world, which God didn't intended for us, but since humans fell from grace, it's the consequence we live with. However, I do believe he can change things.
I also became skeptical of "logical" people who are quick to tell people there is no hope in certain situations. For example, a high school teacher who had various college degrees, told me I wasn't smart enough for college and wouldn't amount to anything. Today, I am a college graduate, who's traveled to places I never thought I would, and work at a known broadcast network, and have had other opportunities people wouldn't have gotten. Not because I am that good, it's just I had faith that God would see me through. I also use my experiences to help others who face similar issues.