Implantation bleeding?

We are trying to conceive, and have actively been doing it, cuz I ovulate on the 13th, and I’ve been tracking it, by using the strips, and the app is typically spot on. My question is this, we did it 5 days ago, but I wasn’t ovulating, and it says the earliest you can have implantation bleeding is 6 days after conception. So the past two days wouldn’t matter.... even though I’m closer to the time of ovulating? Well today I wiped myself and I either am bleeding from intercourse (from earlier today) although there’s no blood in my underwear, and there wasn’t any after doing it when I cleaned up. Or it’s implantation bleeding from 5 days ago? What are your thoughts? I was feeling a little nauseous yesterday too. Out of the blue. Not sure if it’s related.