I don't think something like that ever happened to me, there were some instances in which my balls felt bigger.
Some questions that may help:
1 - Do you ever have a night release? (when you ejaculate during a dream, usually waking up when it's happening)
2 - Did you see any pornographic material? Have you been looking at other woman in a sexual way or having erotic thoughts?
3 - During meditation, have you been putting pressure around the scrotum?
Just questions that might help someone or you figure it out, I'm not implying anything.
