Implantation bleeding already? 🤷🏻‍♀️

So when I woke up this morning 12th August I had what looked like dry blood in my underwear, was only a little bit but noticeable. Is it too soon for it to be implantation bleeding? I got my positive ovulation test on the 4th. So take it I ovulated about 24hrs after that.? I thought implantation happens closer to when the period due?