I cant sleep at night... What can i do to fall asleep

There are lots of methods.

Some people just need a calming environment. If you work in your bedroom, have a tv on in your bedroom, etc, then your body learns to associate all that energy and stress and waking things, with your bedroom and your bed. Where your body should associate sleep.

Try turning everything off, try breathing excercises to calm down. If you're trying to fall asleep but still at a computer or have the tv on you aren't really trying.

Start to prepare your body for bed, for sleep earlier. wind down, turn your tv off, your computer off. get in calm mode.

Try a warm glass of milk at bedtime. try listening to soothing sounds or music.

If you still can't get your sleep regulated, talk to your doctor, obviously, but try melatonin. It's something some people take to keep their sleep cycle on track (it's a regularly occurring hormone in the body), something that some people just take occasionally to get back on track and into a normal rhythm. It's often used by people traveling to lessen jet lag, in both directions.

Their are also prescription sleep medicines.

You could also just try doing something as simple as taking a benadryl, if antihistamines make you drowsy.

But you have to figure out what your problem is. Is your sleep cycle off? Are you just having problems getting to sleep? Staying asleep? Getting good sleep? And you need to figure out why.

because taking a benadryl can help for a night, but you can't do it long term and isn't really going to solve your problem.

many sleep problems are associated with stress. but you could also have a sleep disorder for which you need treatment, and you could only be diagnosed after seeing a doctor, going through your symptoms, when they came on and everything in detail, ruling things in and out, trying things, and eventually doing a sleep study