Insomnia problems.. please help!

I know that this wouldn't be the right place about asking these kind of questions but I had no other choice..:( well I'm currently 13, and maybe since the 3rd of october? I've been experiencing insomnia and I think it's getting worse as the days go on... yesterday I tried to go to bed but I couldn't sleep so I was on my phone until 4am and then I eventually fell asleep.. but I kept on waking up and I couldn't sleep at all so I just stayed up until the morning. Plus right now it's 3.40am and I cant sleep at all :( I'm trying and trying to sleep but I just can't :( I'm getting bad dark circles under my eyes and my skin is just getting worse.. also I'm losing so much energy due to a lack of sleep so I always get irritated by everything and I'm getting stressed alot.. what should I do?