When does sleep return?

I’m 26 or 27 days clean from 7, used kratom for a week. Been off of that for 5-6 days. My sleep is still super broken. I can go to sleep but only sleep for 4 hours. I’m on magnesium every night I have been using melatonin (taking one gummy instead of 2). Last night I tried 2 again and same thing, 4 hours. Just seeing what works for everyone concerning getting rest.