Bloating and Plan B

So I took two plan b a month ago and I had a period that I’m pretty sure wasn’t implantation because I had it for six days and there was discharge blood. It started off very light brown but then got heavier. I was super bloated before and I still am after my period. I’ve taken four tests. Two before my period came and two after. All were negative. I’m pretty sure I’m not pregnant but is it the plan b that’s making me this bloated??