What you can’t seem to come to terms with is that as Catholics we don’t decide what the spirit is saying, the pope in union with the magisterium does that. And yes everyone, as pope Benedict has said, ultimately must follow their conscience, but as Catholics, only after seriously and respectfully considering the teaching of the church.
Think about the implication of your words,
I would even go as far to say that even if the Pope specifically declared as an infallible statement that civil unions were permissible, it would not be infallible because it would conflict with sacred tradition which carries more weight. A Pope can not make an infallible statement that conflicts with sacred tradition.
What you are saying is that you would break with the church. I hope you said this in a moment of anger, because infallibility, unlike the marriage laws, is dogma. As Catholics we agree to be bound by the teachings and decisions of the magisterium, not only when we agree but even when that which the church teaches is hard for us to understand and agree with. If we are Catholics we freely give our obedience to the church.
All that being said, why are you worrying about what might happen, remember,
34 ‘So do not worry about tomorrow, for tomorrow will bring worries of its own. Today’s trouble is enough for today.