Can weed help sleep problems?

I've never used any drugs before, but I have been having some sleep problems. I can only get like 3-5 hours of sleep. Going to bed isn't a problem, but I end up waking in the middle of the night and cant fall back asleep. This happens way too often. I try to stay awake if I can't fall back sleep before 5 am, but that doesn't work sometimes. Nyquil helps, but I sleep way too long with that. I just need 8 hours of sleep. Can weed help? If I use it do I have to constantly use it? Can I use it just once to fix it? Thanks. Also, how how do I use weed without having the smell?