If you don’t want to wade through the thread I linked, I’ve copied the poster’s brilliant advice here on what worked for her, hope it’s useful for you:
Okay .... it has worked!!!!... I have now slept 4 nights solo in my house feeling warm and secure and couldn't believe how relaxed I felt last night....I recognise it is early stages, and still fragile but IT IS WORKING. Rather looking forward to DH being away again to see how far I can take it.
This is what I did... both to celebrate with all of you, and in case there's anything helpful to anyone else...
Saturday (an hour or so): I recognised I was utterly fed up of feeling afraid in my own house, and how it took away so much from me. I decided to start exploring my fears.
I looked at what I was afraid of (violent men lurking in the dark) and what I wanted (to feel confident joyful and carefree when alone in the house). I asked myself how likely it was that there would be a violent man lurking in the shadows - never happened, I know no one to whom it has happened in their own home. I talked to myself about how absurd my belief was. I then thought about what I would do if it did actually happen and realised that I would probably cope very well - when I've had to deal with violent men in real life, I've been calm and powerful and managed to save myself. (Yes, I do realise I have been lucky.)
Sunday (a couple of hours): I started focussing more on what I did want , and imagined myself cavorting round my dark house feeling powerful and reclaiming it as my safe place. Although I didn't actually do this, just imagining it was very energising and made me feel powerful.
I posted on Mumsnet for advice and doing this helped me make what I wanted to happen feel more real. As well as giving me confidence I would actually do it.
I read up online, both what experts said and experiences of those who had conquered their fears - the most inspiring was a woman in her 20s who'd been a teacher in an old french abbey, alone there at night, terrified for weeks and then changed her mindset, and revelled in exploring it at night.
I chose the tactics that felt most appropriate to me:
taking small steps - doing it gradually (so I recognised that leaving lights on and doors closed the first 3 nights was a good idea - full darkness can come later)Preparing while it was still light - so things were set up for me to be ready for darknessdoing just pleasurable things from around 8pm, and nothing confronting in any way so I'd be calm and ready for the night - comforting relaxing music, good food, gentle tidying up, favourite bubble bath, a friend to chat to on the phone for a bitso I felt looked after, cared for, cherishedI did lots of imagining - knowing my big imagination had created the fears, it could create the joy and confidence too... so lots of fun imagining dancing around my house after dark reclaiming itafter my bath, I walked tall and confidently to my bedroom, welcoming the night and darkness around me I realised how important to me it was to change my language from conquering fear to the more positive: embracing loving being solo in my own home and feeling powerful in it after dark. Focussing on this really helpedI paused quite often to just celebrate being where I was and feeling confident and happy about it... In bed, I did relaxing things I enjoy and some lovely breathing /yoga like exercise tapes - and again celebrated being in my beautiful house
I went to sleep so calmly and easily the first night
The second night was fine but less good - I realised I'd done a couple of things that were less nurturing and spent less time celebrating being confident in the dark in my own home so felt a bit jangled, not afraid (so that was progress) but took longer to get to sleep as I was unsettled
The third night I learnt from this and repeated my first night approach, ensuring I only did "lovely" stuff
The fourth night surprised me - I felt so relaxed, as if I had never been afraid in the house... I pushed the limits a bit, going into the garden in the dark and then coming back into the house. I still left lights on, not so many but more than when others are home. And went to sleep happy and confident
So ... looking forward to next time when I'll explore turning more lights off and get to know my house in the dark... step by step literally!
Huge thanks fellow Mumsnetters for being there while I made my journey - I can't believe quite how easy it felt in the end, and how long I have been fearful in my own house, dreading being alone after dark, full of fear and dark imaginings