How stressed would you have to be for it to affect AF? I'm 4 days late which is odd for me - I'm usually clockwork... So I'm wondering if stress could be affecting it or if it could be something else. Thing is I really don't think, I'm that stressed, though I have started uni recently which I suppose could be a stressor. But even if I'm not feeling bothered by it could it still be throwing my cycle out? I always thought it had to be really big stress to interfere with AF.