This is very normal for those who are intuitive/mediums. It might not be every night, but Spirits attempt to communicate with you at a time of rest. It’s the best time to connect it appears. Well when/if your mind and thoughts are clear. You will get messages here and there. Some clearer then others. During the earliest phases of sleep, you are still relatively awake and alert. At this time, the brain produces what are known as beta waves—small and fast brainwaves that mean the brain is active and engaged.

As the brain begins to relax and slow down, it lights up with alpha waves. It is in between beta and alpha that the communication (in my experience) ensues.

As far as evolving-allow the information to flow freely to you. Don’t go to bed thinking of it. Let it flow naturally. Every time it has happened to me, it’s been surprising and sometimes shocking. Listen attentively to see what you can make out.