I am really sorry for your loss. It must be a very difficult and uncertain time for you. Hope you can manage to sort out your living arrangements asap.
Firstly, let the exam officer of your school/ college know. They will stamp each of your exam papers, so that you may be given a certain minimum of marks. ( ? 5%). comes up to 1 raw mark or 6 ums per paper.---I think
If you are in A2 , you should contact the admissions officer at the uni, or better still, ask your head teacher to do that for you. I am sure they will give consideration.
one of the girls taking GCSEs last year, lost her mum in March. She got the extra marks in each of her papers.
good luck!