In the words of the Buddha
>Chill, Homie. You need to let that shit go.
But existential crises are a tough thing to get through, and some people never really get past it. In my opinion it's very much a personal trial to overcome. If you've found yourself in a spiritual rut and are questioning your faith/values/religion, try approaching your problems/doubts differently. I can't speak much to the specific aspects of your crisis, but my best advice for you is simple: rather than focusing on what you're now uncertain about, start by focusing on what is certain and how that relates to your problem.
I might be talking out my ass here, but I hope you find your answers, friend!