Abnormal bleeding

Jessica
I had protected sex 2 nights ago and and am around 11 days away from when my next period is due, this afternoon I noticed some light bleeding which continued for a few hours and seems to have stopped. Didn't have any pain or anything. Everywhere I look is telling me it's implantation bleeding but I'm like 95% sure the condom worked fine or he would have said something right? This cycle is the first time I've had intercourse in over a year. Could just be starting my period super early but won't know until tomorrow. Anyone have thoughts on what it may be? Very paranoid, SOS xx