I don't think you're crazy. When I was younger I would always hear my mom calling my name, even though she wasn't. I thought I was going insane, but it turns out that hearing things is a sign of mental health. I also have very bad nightmares every once in a while. I never remember my dreams unless it is a nightmare where I'm tortured and killed. I feel like I'm really there, and I wake up crying every time in shock. I find that if I distract myself with something I really enjoy, I have nightmares less often. Ex. I play piano and since I've been focusing on that, I haven't had a nightmare in about 4 months. I also write in a journal to get down all my frustrations and fears