Well i dont know how they will look at it as far as "if you knew or not" i mean you were a kid and our whole struggle is based on that, but thats up to their point of view. But I would steer clear from saying you came with a fake passport. Because one you are obviously aware of it now, you just explained the whole story to us. and two, you could have come from China, people travel to Central American countries from all over the world to go through Mexico to get in the US so its not far fetched that you came through the border just bc your from Africa. I have a Philopino friend who took a plane to Costa Rica with his family to go through the journey all the way up through Mexico then into the US.