Had emergency contraceptive pills 10 days ago. I have started bleeding heavy like in periods(May 9 2014 ), having abdominal cramps, mood swings, fatigue. Was excepting periods to be on 20 May but have started bleeding on 9.
Bleeding is heavy and clear having no lumps like a regular periods.
Brown spotting also present like one before periods.

Does it mean pregnancy(not expecting )?
Or implant bleeding?
Or irregular period due to pill?