Confused??

So I got this for like a day like on the 5th of this month, I don’t know if it was implantation bleeding or not, then the next day nothing. Then the next day after that, I’ve been getting discharge everyday since then. I don’t know when my period is supposed to show at all, because I took a plan b a few months ago and it messed with my period, but me and my boyfriend have had unprotected sex 3 times I don’t think it was when I was ovulating but it could’ve been. We had sex the other day, then a week ago, and before that it was in March at the end of the month I think. I’m honestly confused, I know it’s early to tell if I am pregnant again, but I’ve been nauseous, cramps but they come and go, boobs hurting, back hurting, missed period I usually get it on the 7th which I got last month right on the 7th.