Okay this is gonna be confusing .
A month ago I had protected sex . I still felt unsure about it so a day and a half later I took plan B . Shortly after I took plan B a week and a half later I got a period which lasted 4 days . Not as heavy as my regular period but heavy enough to turn the toilet bowl red. Then since the day I have only messed around ( dry humping, fingering ) but recently for the past two days I have had cramps and dark brown discharge , there are times where there is blood in this discharge . I'm really concerned. I took a pregnancy test and it came out negative . I think if I was pregnant from a month ago it would come out positive . And I honestly don't think messing around can get me pregnant . So please help me :(