Please help!!

Ok so I got my first period this summer Rhe last day of June and it continued through the 4th. Then August I waited for it but I didn’t come back until September 29th than went through the 5th then it came October 24th then ended the 30th. It hasn’t come yet this month and it’s November 29th. I don’t know if I should be scared! I have never had any sort of sex so I don’t think I’m pregnant but I don’t know a lot about this kind of stuff. Please help me!!