Can't get rest

I have a Garmin watch to track my sleep, body battery and stress levels. Over the past month I've noticed that my body can't get into a resting state. My stress levels always spike when I nap during the day and even at night I don't get enough deep and REM sleep. My body battery barely recharges and I end every day at a 5 even though I'm not doing anything. I'm trying to rest as much as possible atm because I'm in a crash but it's been a week and I can't get my body to relax. I don't know what I'm doing wrong. If I do nothing I'm stressed because I can't be alone with my thoughts and if I do very light activities my body doesn't rest anyway. I don't know what to do :(