Do I have some kind of sleeping disorder?

I've been an insomniac all my life. It runs in my family. It's is very typical for my dad, sister, and I to be awake at any time of night (technically morning) just doing our thing. I have trouble getting to sleep, and usually have to wear earplugs to bed. When and if I do sleep, it'll be for 10-12 hours. Yeah, it's awful. Recently, the only thing that helps me sleep is pot. Yeah, it's not for everyone, but it works for me. Not only do I get a restful night sleep, but I'm not over-sleeping either.