Decree on Original Sin, canon 4: "If anyone denies that infants newly born from their mothers' womb are to be baptized," even though they be born of baptized parents, "or says they are baptized indeed for the remission of sins, but that they derive nothing of original sin from Adam, which must be expiated by the laver of regeneration" for the attainment of life everlasting, whence it follows, that in them the form of baptism for the remission of since is understood to be not true, but false: let him be anathema. For what the Apostle has said: "By one man sin entered into the world, and by sin death, and so death passed upon all men, in whom all have sinned" (Rom. 5:12), is not to be understood otherwise than as the Catholic Church spread everywhere has always understood it. For by reason of this rule of faith from a tradition of the apostles even infants, who could not as yet commit any sins of themselves, are for this reason truly baptized for the remission of sins, so that in them there may be washed away by regeneration, what they have contracted by generation. "For unless a man be born again of water and the Holy Ghost, he cannot enter into the kingdom of God" (John 3:5) (DS, 791).
There's no way that I'll believe in Baptism of Blood and or Desire without Church teaching and relying on theological arguments.
Also, I don't hold that is heretical to Believe in Baptism of Desire but for me as of today I could only find flawed theological arguments that either contradicts or are incomplete.
THEREFORE the best way to deal with Baptism of Desire is: It's possible BUT WE DONT KNOW, THE CHURCH DONT TEACHES BAPTISM OF DESIRE