Newbie, spotting on Cycle day 18? So Confused!

Hi ladies, thanks in advice for your help, I'm on cycle day 18, 2-5 days past ovulation (cycles can be anywhere between 28-32 days and this is my fist month TTC no 2. I woke up this morning with red bleeding, not enough to soak though a piece of tissue in my underwear (didn't have any pads) still going but still just as light! What's happening! I'm so confused, to early for implantation 😫