Cramping/spotting pregnant ?? Need help

Hey everyone so I had protected sex the 31st we used a condom and he pulled out it was quick and a day before my fertile window . 

On my predicted ovulation day I got a lot of mucus and a tinge of blood the smallest bit and I haven’t gotten anything since that one day and it didn’t last at all .

And I’ve been cramping really badly still after my ovulation window ended and I don’t understand why . I checked for holes and there were none and I heard implantation only happens after ovulation.

I’m so confused :(