Hi, it appears self made sleep problem .you need proper counselling.

Try exhausting yourself both physically and mentally during the day. Go out in the sun if possible, take small walks in fresh air, avoid stress (difficult in these times though), avoid caffeine after 5 PM ( as it stays for 5 hours in the blood). It’ll take 3-5 days to develop these habits but after that it’ll be easy for you to maintain them.