No. You cannot get permanently stuck in the astral realm during an out-of-body experience (OBE). Your consciousness always remains connected to your physical body by an ephemeral silver cord that allows you to return at any time. The key is to remain fully aware and conscious as you move about the astral plan cabin. The more purposed your consciousness is, the more "in control" you will be (I realize that's a paradox - you need to surrender for optimal astral travel - but you've also got to have a good dose of awareness to keep you focused).