after honeymoon no period 😳

Honeymoon was from October 15-22. Ended my period October 25 or 16. We had a son six months ago and my periods have been a little bit irregular but at first I would spot for multiple days before actually bleeding. I always keep track though and the latest that I actually started bleeding an actual period was like the eighth or ninth of every month.  I still haven't started my period this month and I use the nuvaring religiously. In fact I sometimes even keep it in during my period and then switch it out which my gynecologist said was ok. Could I just be late because of stress or something. The nuvaring should have worked so I'm trying to talk myself out of the possibility of being pregnant.