What's an "ordinary catholic"? A cafeteria catholic? A catholic in name only?
Christ said the gates of Hell would not prevail against The Church, but of course, the sick minds of men may cause a division.
The face of the Church will change, and is changing, I think numbers will drop, and that we will see more influence from Eastern and African nations, ie. not so many pasty white faced cardinals and Popes. This is not a bad thing.
Europe is dying, it is sinking into the filth of secularism and sexualisation of the human person. America and other Western nations are the same. These places are rotting away in their bellies.
We will know the true Church by the Truth. IF you ever see a Pope sign the okay on gay marriage, contraception, abortion "women priests", then that's not the Pope God desired, and its not the Church he runs.
There might be a schism, there will the fake catholic church, and there will be the Catholic Church, which will probably be like it was in times of old, where Catholics had to risk their lives to hide priests and attend Mass. Where Church property will be taken, huge taxes levied, banning children from being instructed in the faith, et cetera.
And then when human civilisation collaspes into the filth they brought upon themselves, it will be the Catholic Church who once again, pulls them up out of it. Take comfort from the examples of history.
I'm actually not too worried, really. It'll certainly prove beyond any doubt, who's Catholic and who's not.