I need a GBOYN's expertice I don't know if you will know this but, I have been masturbationg for about 4 years know and I am 13 but I have only just started finger penetration because it has only become non painful only 3 months ago. Is this a sign of my FIRST menstral cycle? I have become very moody and impatient and kind of mean. I have not had discharge. Is it possible for discharge not to be a sighn of your firdt peirod?

No, this is not a sign of it. At least the easy penetration.