There are some nights when I get very frustrated because I feel dead tired, yet I can’t seem to sleep. Medical sources on the internet say this could be caused by what you are doing just before turning out the light. They say don’t do electronics, don’t eat heavy meals, drink alcohol, or keep the room too warm or too bright. If you nap during the day, try not to sleep too long. Stress, anxiety and changing your body schedule can also keep you awake despite yawning your head off.
Try to keep your daily routine as consistent as possible. Gentle exercise or yoga might put you closer to sleep mode. Try not to do any heavyweight thinking or planning just before bed. Some folks prefer to fall asleep listening to soft music or relaxing sounds such as raindrops or jungle hum. My grandkids have static noise filling their rooms when it’s their bedtime.
Above all, don’t give up. Everybody’s a little different. Find what works for you. Sleep is vitally important. Your body needs it. Use pills as a last resort.
Pleasant dreams.