Change in cycle?

Hi everyone. I've had 2 cycles of IUI with follistim and trigger. Had to take this month off due to cysts. I usually get AF around CD 30 or 31 (though it can vary from 27-35) Today is CD 31 and nada. Negative hpt. No PMS symptoms. Only notable things are lack of low back pain (which I have all month but peaks the week before AF) and an incredibly heightened sense of smell which was triggered some nausea. Any thoughts? Could the medicated IUI have made my cycle wonky? Plan on calling RE on Tuesday (CD 34) if I don't see something by then but I thought I'd ask you guys. Thanks.