(TMI!!) ⚠️⚠️ Implantation bleeding or Period?

On November 15th I had unprotected sex. During the attempted sex however, my partner and I did not successfully penetrate...so we stopped. On December 2nd , I'd been experiencing a lot of bloating in my lower abdomen along with tender breast, so I just assumed that it may have been my period coming on, but it did not come on that day. Today, December 4th, I started bleeding a bit more, but I'm not sure if it is my period starting or implantation bleeding since I did read up that implantation can occur during the same time as your cycle.