I'm so so sorry that you've had it tough.
Well Done for taking the first steps to seeing the doctor, that is a massive achievement and you should feel so proud of yourself for making it.
Unfortunately, the NHS waiting lists to see a psychologist can be long-ish, so I'm worried for you, as to what you will do between now and then, from personal experience, all I can suggest is:
1. Have a hot milky drink before you go to sleep, there is a chemical released in milk, when it is heated, which can aid sleep.
2. Try and 'tire yourself out' through the day, so you will sleep at night. Swimming, walking far, even just a walk round the block before you try to sleep can work wonders.
3. Read in bed. Sometimes it can help knock you off.
4. Do you have an ipod/mp3/personal CD player? Sometimes listening to music can help you sleep. I literally can't fall asleep WITHOUT listening to music, I think it's because it can drown out the silence, and make you feel less alone. It might help :o)
5. Hot baths are amazing. Make sure you've had something to eat (cos being hungry keeps you awake) and get in your PJ's then climb into bed and you might fall asleep quicker.
I don't know what's happened to you, but it's sounds traumatic. I hope you are feeling better soon xxx