jayk15,
The only way that your Baptism could be invalid is if what is known as the “essential rite” is not performed. The essential rite involves the triple infusion of water accompanied by the Trinitarian Formula: “[name], I baptize you in the name of the Father, and of the Son, and of the Holy Spirit.” (Or, on the unlikely chance that you are an eastern Catholic: “The servant of God, [name], is baptized in the name of the Father, and of the Son, and of the Holy Spirit”). I would imagine that the only way the priest could have failed to do this would be if he were passed out on the floor. Look at the Catechism paragraphs 1234 to 1245 if you want more information.
If it would make you feel better, my friend, do talk to your priest about it. Remember that God is not trying to trick you, though. Congradulations on approaching your baptism.