How to Fall Asleep Fast in the Car for a 16 Year Old ? Answer A.s.a.p?

Okay i am taking a 19 hour car ride to somewhere and were leaving at night and i want to how to fall asleep so my mother dose not yell at me i am 16 i don't know why she instits i sleep i think cuz so i wont bug her all the way lol i dont want to stay up all night the day b4 b/c we are leaving at night i am in the front seats , the seats are not that Comfy mum so ya

any idea like food or what kinds of food wiil make me fall asleep
i cant take sleeping pills cuz of health issuses

Suggestion:

music helps me