I missed my period (was 20 days late) after i took the morning after pill and i was due this Wednesday how ever i came on my period last tuesday after it being 20 days late but it was un usual? It was very heavy the first day and then lighter the second day and then i could go the rest without wearing a tampon as it was very light?  This never normally happens? Is this the period i should of been expecting this Wednesday or was this my 20 day late period or is this something to do with pregnancy? I took a pregnancy test 2 weeks after i was due and it came back negative but still unsure? Anyone help please!