I have panic disorder, as well as obsessive compulsive disorder (OCD), and I used to be very religious, and I, too, found my disorders interfering with my religious practices (such as praying). Mostly, I guess it was my OCD that interfered, but panic certainly did, too. I would feel like I had to say certain prayers or parts of prayers repeatedly, and yet I felt God wanted me to control it and only do it once. I didn't know if I should try to get it "perfect" or if I should just say it once and feel uncomfortable, and maybe that God actually wanted me to get it perfect and repeat it as necessary.

Over a couple of years, I had doubts and looked for answers, and I've come to the conclusion that I don't know if there's a God or not. That said, while I often defend atheists, I believe in the possibility of God and an afterlife; I just don't agree with any particular religion as to how it is.