A psychology major delves into his own mind by practicing lucid dreaming, but quickly finds himself losing control of these dreams as they force him to confront his darkest fears, secrets, and memories.

I like the idea. I also like that movie.

This does sound like something that may already be out there but it is also something that sounds intriguing. My main comment with the line is to not be too general by saying 'confront his darkest fears, secrets and memories' and instead pinpoint something her is going to face. You need to know the details of this story and this needs to come across in the log line.

Ever see 'Altered States'? Awesome movie with a young William Hurt.