I am 16 and have had trouble staying asleep for a few weeks. when it started i was stressed, but not anymore. has my body been trained to keep waking.

Anxiety: underlying anxiety is an important reason for sleep disturbances like insomnia. Please get your self checked for anxiety

Sleep hygiene is key: Retire & rise same time each day. Bedroom should be dark & cool - used only for sex & sleep. Turn off tv. No naps. Exercise regularly but not in late evening. No caffeine for 6 hrs & no alcohol or tobacco w/i 2 hrs of sleep. Dinner should be moderate sized & finished at least 2 to 3 hours before sleep. Can try warm milk, chamomile tea or melatonin along w light reading, warm bath, lavender scent.