I took the take action contraceptive pill the morning after an accident and started a heavy period a week and a half later (my normal cycle time). I had 3 consistent periods including the first when this happened. I missed my period for March and seem to have symptoms now in April of starting my period around the normal start date. I haven't had sex since the accident 4 months ago. Is this a normal side effect to actually skip a period this far down the line?? I worry something more is going on.