Implantation or my period

Ne

I got off my period July 5th then I had

unprotected sex the 10th & while ovulating

then I took w plan b the 12th at 1:30pm and

my period is not supposed to come until

the 30th or the 31st of this month and i

started having slight pain in my abdomen

last week it would come & go I started

bleeding yesterday it's really light and I'm

having light cramps idk if it's my period or

implantation I also have been feel slight

nausea & mood swings & I've been really

tired & hungry