i cant sleep , please help and speak with me

I'd say melatonin would be your best bet. You quite literally cannot have a dangerous overdose on it, you'd just have some unpleasant side effects if you did, and it's naturally made in the body already. Before bedtime, stop looking at blue light, meaning get off your phone and computer and read a book from there on out. This will increase your own melatonin production and tell your body that it's time for bed.