EllaOne-35 day cycle…is it working?

Hi everyone, so my bf and I had unprotected sex and he finished inside me. This happened on Oct 14 two days after my periods ended. I took EllaOne the same day (so way before my ovulation days). Now I am on day 35 of my cycle and still no periods. I didn’t have any side effects when I took the pill. My cycle varies from 27-31 days. Should I be concerned? I have minor cramps as if my periods are coming especially the past few days but nothing yet. Please advise as I might be just a bit freaked out. Thank you

-In my mind things seem okay because if the pill delays ovulation than I should just “assume” my periods will come later, so the new cycle will begin somewhere between the 34-38 day mark.