I was told to start 2 days before I was due (I am very regular usually) but my cycle was due to be over before my vacation so I didn't start it. At 2 days late I panicked since it would interfere with vacation so I started taking it. I've taken it for 2 days and have had spotting and mild cramping. Will this last the duration of the 7 day medication?? If so am I better off stopping now and what would happen?