Contraceptive help

My boyfriend and I decided to have unprotected sex and planned on getting a contraceptive the morning after. Did - took it. About a week or two weeks later i got my period early. Had heavy bleeding for a week, so it was like a normal period for me. Assumed everything was good. Two weeks after that, when i was supposed to get my period, I’ve had an excessive amount of discharge, and saw slight spotting, like when you wipe and are like oh shit it’s coming haha, but we had protected sex last night and I’m not bleeding even though i experienced yesterday what normally happens when I’m getting my period following a few hours or a day, So i don’t know, I’m just concerned- i could always take a pregnancy test to make sure but what do you ladies think? Is there a way I’m pregnant and this is implantation spotting ? Even though i took a emergency contraceptive and got a full period ?

-mostly wondering if anyone has also taken a contraceptive and then got a full period afterwards then experienced spotting when their period was supposed to come originally