Just a question

Okay, so I recently broke up in May out of an emotionally abusive relationship, I was not on birth control or anything with him because he wouldn't let me nor he hated condoms but we were together 2 1/2 years and I never once got pregnant. Well I started seeing a guy and we slept together two days before my expected period and it never came, still hasn't came. I was supposed to get it on the 22nd but its now the 29th.. My twin said my ex could have been infertile (does that happen?) But I was curious on if this is possible? Could sex push a period later? My mind is really worrying and so is the guy, but I don't want to worry about it. I'm currently on cycle day 42, and its been regular but I also have been under a lot of stress and different environment from moving back home from Michigan back to Washington state.. Anything helps?