What are the chances of me being called to court?

Basically i'm in a situation where a friend (lets call her Sarah) confided in me about her friend (also my friend but we're not as close, lets call her Megan) who had been having a sexual relationship with a teacher in our school. After a while I persuaded Sarah to tell a teacher about this. It eventually got taken into the hand of the police, I have recently given a statement about what I know although all I know is what Sarah has told me, Megan didn't even know that I knew, so it is basically second hand information. I've been told I could be called to court but it depends on whether the judges think my statement is worth it. What chances do you think there are that I will be called? And did I do the right thing in pushing Sarah in to telling someone? Also the teacher has pleaded not guilty which makes the situation even more complicated. Any advice wouldn't go amiss as I am sooooooo nervous about all this, thank you! :)