What is there to explain. An atheist became a christian. Big deal, it happens all the time. I can only assume that you are the OP, but even if you aren't, I don't care. It's really no big surprise that someone became a christian.
What I want to know is what made this person feel lost. Where they home alone? I mean, I'm home alone right now and I don't feel like praying to god. Were they depressed about something? I don't know, but that OP is very vague.
Yeah, there is no evidence for God in your post.