I just recently stepped off the religious boat, and while it wasn't easy, it was the best thing I could do for myself. I'm still in the process of figuring out exactly what I believe (or don't), but I am at peace knowing that the god of the christian bible, and any other religion, does not exist. The more time I spend learning though, the more I'm convinced that there isn't any supreme being out there.
Don't let the stress and anxiety over the unknown affect your life. It's not worth ruining your mental (and physical) health over. Write two lists... One for why you believe in a god, and the other, reasons for NOT believing. You might find that one of the only reasons you believe, is because of fear of punishment. Keep adding to your lists as soon as new stuff comes up. I've found this to be helpful in my own life. Anyway, just a suggestion.
Don't let the stress and anxiety over the unknown affect your life. It's not worth ruining your mental (and physical) health over. Write two lists... One for why you believe in a god, and the other, reasons for NOT believing. You might find that one of the only reasons you believe, is because of fear of punishment. Keep adding to your lists as soon as new stuff comes up. I've found this to be helpful in my own life. Anyway, just a suggestion.