Maybe you should try to focus on your sleep hygiene. Do you do other things in bed than sleeping? Try to avoid it, because this causes problems falling asleep in some.

Try to turn off all electric applicances in your room. You might be sensitive to electrosmog.

Alpha-meditation, or rainbow meditation technique helps one to relax.

Examine what are you eating. No heavy foods prior going to bed. On the other side a banana may help with falling asleep.

Sleep in maximum darkness you can achieve. Curtains, turning off all lights and all.