It is IMPOSSIBLE to enter into schism or be in schism by the act of holding the Catholic Faith whole and entire, and by being in union with and subject to the Roman Pontiff, and the Petrine See in se.
Good faith controversy over the identity of the Roman Pontiff is not schismatic.
Go to Mass. Ask Our Lord to give YOU the temporal punishments due, if any, of your priests who might commemorate the wrong man at the Te Igitur.
St. Vincent Ferrer, pray for us.
St. Catherine of Siena, pray for us.
St. Bernard of Clairvaux, pray for us.
St. Peter Celestine, pray for us.
St. Peter, pray for us.
St. Joseph, pray for us.
Our Lady, undoer of knots, pray for us.
Lord Jesus Christ, have mercy on us.