Is there a chance of implantation bleeding?

So I have a week and four days before my next period and I randomly started spotting in my underwear. I started to panic a little but also remembered that me and my boyfriend yesterday had sex 3 times which is uncommon but happens and there was never any blood. Today while we were having sex, he noticed my discharge had a pinkish (mostly brown) color to it. After sex I went to pee and when I wiped there was more blood than I experienced in the morning. Did I most likely damage the interior of my vagina or could it possibly be “implantation bleeding”