Can anyone help me out?

Hi everyone! Okay so I am a little concerned right now. I am currently two weeks late for my period, and I am usually very routine every month; my body has been pretty regular with menstruation. It's been about two months since I last had sex; it was maybe a couple days before July 4. I had my period in July like normal, but for August it is just non existent. I also currently have a mild UTI, is this maybe from that? I just went through a bad breakup with my boyfriend of almost two years also so I was also thinking it may be stress or the like. If anyone has been through anything similar please let me know so it could ease my mind a little!