Period is late

Brandi • Special needs teacher . Wife . Dog mommy . 👼 mommy to an angel baby . Tried IVF and iui . Thyroid issues . Trying for my rainbow baby 🌈

I have been on antibiotics can that make your period late ? I haven’t really had cramps .. I doubt I am pregnant since we have dealt with infertility for years but just wondering why I am late ??