Insomnia

Since my latest operation I have insomnia. I feel like I never sleep. Every thought going through my mind, hearing every noise. I hate it.
Tonight I'm on my own for the first time in 5 weeks. I just want out of this house. Kids are asleep but i almost wish they would wake up.
I just feel so alone and just keep reliving all the horrible things that have happened this year in particular. I'm scared to be alone as have already had medical complications, im scared that if something happens how will I get help. I'm a single mum. I'm also scared because I was in bed when the complications happened before.
I already hate being alone at night even before all this. Go back to work in a week and I'm just not sure I've got it in me to do it all anymore. I'm tired. Have seen my counsellor today and had a lot of changes / stresses over the last 4-5 months.

How do I handle the insomnia? Lonliness? Worry? I just feel like I want my mum to come back. Sad I know.