Lucid dreaming could help you a lot! If you become lucid during a nightmare, you can blast those spiders to bits, or push the person on top of you off. It's a great experience and it cures nightmares very well, because you know you're dreaming and nothing can hurt you. You'll know everything around you is just a making of your imagination, and then you can do anything you want. It's really amazing and I love it, and I know you will too.