Possible implantation bleeding??

So my husband and I had sex 3 or 4 night ago. I was supposed to get my period 2 days ago according to the app. I have PCOS and my ovulation is not regular in accordance to my cycle- my body does whatever the hell it feels like. So this morning I noticed some pinkish spotting. It hasnt picked up at all and its going from pink to brown... but not enough most of the time to hit a panty liner.. It's more like bloody discharge rather than spotting. Has anyone has implantation bleeding so soon after intercourse? Could this possibly be implantation bleeding?