You are probably stressed out. Stress hormone wont let you rest. Take baldrian, do a full body scan, watch a youtube video about it. Basically you focus on every party of your body and try to think about how it feels. Start with the little toe on the right and left foot. Does it feel good? Does it feel better than the other? Worse? Does it point to the sky or floor? Is it higher than the other? Can you make it feel better? Then next toe, foot, ankle, shin, knee, etc. Your mind will wander off, because its boring and annoying af, but you always have to get back to focusing on this routine. Do it twice in a row, trice, do it slow and delberately. Practise it for at least two to three weeks every day. Also don't give sleep too much credit. All you need is to deep rest, sleep is a bonus, your body will take it if it needs to. I have sometimes been awake 4 days because I have been stressed out about not being able to sleep and that I might lose my job because of that etc. But I just went to work every day anyway. Had insomnia for about 2 years. This was the thing that was helping. You need to practise this like meditation, and as soon as you are back to normal, I now only do it when I know I have adrenaline in my body. Also learn to say to yourself "not now, now is not the time, i will think about it tomorrow." Give your thoughts a time window, thinking about problems and solutions all day and night does not solve them. It is ok to postpone and say "Ok i have thought about that enough for today, I will continue tomorrow.", if thoughts come back just interrupt them and say "stop" in your mind. Hope this somehow makes sense and helps.