So could be that but still try and book a scan thru the Dr to see what's wrong
My period was 4 months late the last one I had was in august I've done pregnancy tests and all negative. Booked a scan thru my doc for the 10th December and two days before here comes the period still been to the scan nothing to see and they couldn't tell why it was late. Had some signs of pcos but wasn't really visible on the scan.
Talk to a dr, other wise you could be late. Sometimes period skip like a month sometimes two