Can sinusitis surgery affect menstrual cycle? 8 days late surgery was 9 days ago. Pretty reg, nauseas, bloated, fuller breasts. No cysts, neg pregnanc

No. That would be extremely unlikely for the surgery itself to affect it. However, surgery imposes a degree of stress on your body and that may have indirectly affected your hormones(estrogen & progesterone) involved in controlling menses. Things should normalize soon.