I took Plan B back in January and my cycle in February and March were really off and my cycle for April never came.. and now it’s May and i’m having weird spotting. I wouldn’t even call it spotting it’s more or less like brown discharge. it’s been happening for the past two weeks on and off and I’m not sure what it is. please help! and it’s the smallest amount it’s really weird. i took a pregnancy test a week ago and it was negative. should i be worried/ what is going on?