Cajun Pasta Shrimp and Chicken

Ingredients :

 8 ounces uncooked fettuccine
2 chicken breasts cut into 1″ pieces
1/2 pound shrimp (I used 31/40 size) thawed & peeled
1/2 teaspoon garlic powder
1/2 tablespoon + 1/2 tablespoon Cajun seasoning (use a low or no salt variety)
2 tablespoons olive oil
2 tablespoons butter
1 cup heavy/whipping cream
4 ounces cream cheese (I used 1/2 block of Philly)
2 cloves garlic minced
1 cup freshly grated parmesan cheese
Salt & pepper to taste