Insomnia support group

Anyone else finds herself unable to fall asleep? How many weeks are you? What is it that doesn't let you sleep?

I'm 30 weeks, it's 3 am here, I've been in bed for about 4 hours and my eyes are still wide open. Nothing hurts right now, it's just my mind that wanders. And I feel like the more sleep deprived I am, the more paranoid I get. I start worrying more and more about random things, I keep imagining situations where things can go wrong with the baby, I spiral into a funnel of crazy.

Any advice on how to get these thoughts out of my head and just fall asleep?