Was it always like that? I mean, I don't need that much sleep and never needed much. I go to bed between 22 and midnight and will wake up at 4AM every single day, no alarm needed. I will wake up even when I go to sleep much, much later. I've been doing that most of my adult life.

One thing that helps me a lot as I study a lot at night, is to study under a yellowish Led lamp (and not in bed, but sitting or standing at a desk).

I also exercise a lot. I walk, every single day. I will walk as often and for as long as I can, and will use any excuse to do so. It helps me feel much better and a lot less stressed out when I go to bed. Maybe that is something you could try? If not by walking, by doing gymnastic, or something?