hi yubacity, hope you are better!
i think sleep related problems are different to everybody - so many factors you know?
metabolism, water intake, length of time using etc. etc.
i quitted horse but not really cause i was put on subutex 24 hours into withdrawal so cant comment on that -
but i did stopped subutex 3 times (unsuccessfully) for months at a time and for me the insomnia lasted for about 2 months -
but i was not educated enough. i didnt drink a lot of water and my diet was not right,
i spent nights in front of a bright computer screen and didn't take my brotizolam as i stupidly tried to quit subutex and benzos at the same time - not recommended! i discovered the hard way that one drug at a time is the right way for me and i think to many others..
maybe try to google "sleep hygiene" if you haven't already -
very good advices on getting more sleep..
drink lots of water and eat right, maybe it will not make much of a difference but couldn't hurt i think...
hope that helps even a tiny bit.. good luck bro,
jona