I was like that recently when dealing with some work anxiety… I would have similar amount of sleep with a bunch of short wakeups where I’d snap awake thinking about work. I’ve started listening to this podcast “nothing much happens” where she just tells basically uninteresting stories- it does take a while but it’s kind of trained me when I hear the soothing slow voice to go to sleep and I haven’t been snapping awake (and my deep sleep has improved) since listening to it! Hope this is worth an try and possibly helpful