I think everyone knows the feeling of anxiety at bedtime. I recently read about a technique to fall asleep quickly, called 4-7-8:
1. Lay as comfortable as possible. Try to distract from everything and not think about anything. Clear your thoughts.
2. Relax and exhale.
3. Take a few quiet breaths through your nose for 4 seconds (2-3 breaths).
4. Hold your breath for 7 seconds.
5. After this exhale as calmly, smoothly and relaxed as possible through the mouth. For 8 seconds, take slow, short breaths with your nose and exhale the same with your mouth.
The main thing - do not let into your head any thoughts at the end of practice 4-7-8.
This technique helps when I feel anxiety and can't fall asleep. Hope, it will help you too. Good luck.