GCSE malpractice

A teacher came up to me and some friends before the exam and told me what a question on the exam would be. I panicked because she told me she didn't want to lose her job so I should keep quiet so I just sat the exam, but I immediately started wondering if I should have done that and if I could get in trouble. After the exam I told my friends about how much I was worried and they told me to keep quiet and noone will find out, I also asked the teacher how she found out and she said not to tell anyone because there were 2 jobs on the line. Then when I came home I realised that I could get disqualified from all the other AQA exams if someone finds out so I decided to report her. I'm going to speak to another teacher tomorrow.
Could I get in trouble for this?
(Also I didn't ask to know about the questions, she just pointed to a page in the text book then said that the topic will come up)