I found out yesterday that I am not the father of my child. What to do next?

I've deleted the comment where I claim to be an expert on Tinder which I regret now. It was a heated debate and I lied about being on the platform to win it. r/Tinder is a fun sub with bizarre conversations and comments. I was on OkCupid before the relationship but never on Tinder.
I've deleted no comments where I talk about race or anything. Those are obvious troll comments made against a racist pretending to be black. Please read the post and whole comment thread. The language gives it away and I sum up all the talking points of conservative racists. He has linked it from midway. Why won't he share the link from the very beginning. It's clear as day. The whole post was about the racist who is calling me racist. I've called him out in the beginning. Nobody says "Lord Trump".

/r/relationship_advice Thread Parent