irregular periods

megs

So i’ve had an irregular period most of my life and im 6, nearly 7 months postpartum now, haven’t breastfed in 4-5mo. I’ve been mostly safe when it comes to sex and i don’t feel like i am pregnant, which i know is stupid to say but i knew when i was 4weeks with my first. But anyways, my last period was in the second week of October and i have yet to see my period since. I took a test exactly one month ago that said negative and ive yet to experience any pregnancy like symptoms, or even oncoming period symptoms but i still feel paranoid. I’ve been quite stressed out but can stress really delay your period this long? this january will be three months late. my friend says that it could be because of breastfeeding temporarily suspending my ovulation but i only breastfed until my son was 2 months old in august. has anyone else experienced long breaks in their periods like this since having a baby, without pregnancy being the cause ? sincerely, a concerned, young/new mom