Player was down on "fumble" play. Could not challenge, was not reviewed in OT.

I got the stupid fake fumble scenario where they expect you to challenge the play or sometimes has the play automatically reviewed but I was in OT. I'd been on defense first, they scored, and then I had the ball. I ran the ball, my back was BLATANTLY down and would have 100 percent been overturned with review but because the game was over I couldn't even use the challenge and obviously it wasn't automatically reviewed. So, I lost the game.