You've experienced a traumatic event, and not so very long ago, although other important things have happened since then - your exam results, getting your uni place - and they might have acted as temporary distractions from the trauma. I'm no expert, but I would say that the way you're feeling now is part of an on-going reaction to what happened.
You need to care for yourself, first of all. Can you get cosy? Wrap yourself in a warm blanket, have a hot chocolate, get a hot water bottle to cuddle? That might help you feel less shaky.
Please try contacting an organisation that can provide real life support and help you find coping strategies that work for you. Rape Crisis, Women's Aid, the Samaritans?
Your dark thoughts and sense of hopelessness are part of the reaction - it's like delayed shock, I think. People here care for you, your family care for you, and you're already making new friends who're already reaching out to you because they do care about you.
You're in an in-between place just now - in more ways than one.
Please look for support as soon as you can, and if at all possible, before you start uni.
I've been thinking about you, and checking this thread to see how you're doing.
Be kind to yourself, and care for yourself.
You're doing so well, even though it might not feel like it just now.