I don't understand the hate on the teacher in the comments. (S)he probably couldn't hear what was said, only that they whispered during a test, which is forbidden for good reason. Had (s)he ignored it, the other students would probably either think the teacher won't act against cheating or is inconsistent in it and favors certain students, which would cause a lot of complaining and cheating... unless they figure (s)he must have supergood hearing. I do hope (s)he listened to their side of the story and gave them some sort of opportunity to fix it. Tl;dr: FYL, OP, but based on the little info we have, I see no reason to think the teacher has it out for you.