I am 9 days late, negative tests as of 4 nights ago. Anyone else experience this ? I did have sex when the calendar said I was ovulating but I also did start a few days early last month because I put my birth control patch on which started my period early but it had fallen off a couple days later and I just left it alone. So it’s been off for a little over a month. I wasn’t on it regularly either, it was only a few months at a time. I never have had this problem.