No, the unforgivable sin is to refuse to accept Jesus as your Lord and Savior. If you want to be saved you need to repent of your sins. Accept what Jesus did on the cross to pay for those sins. Accept Jesus as your Lord. Read the Bible. Study the Bible. Do what it says.
You're not a Christian just because you're Catholic. And it's not enough to know that Jesus died for the world. Salvation is like a gift under a Christmas tree. Unless you accept it, it's not yours.
Those who are truly saved and follow God with their whole hearts will see great positive changes in their lives.
RE: UNFORGIVABLE SIN & REPENTANCE