Crock Pot Chicken Fettucini Alfredo

1.5 # boneless chicken breasts
2 pkgs white mushrooms,  slices
1/2 tsp salt
1/4 tsp black pepper
1/2 tsp paprika
1/4 tsp garlic powder
16 oz cream cheese,  cut in chunks
2 sticks butter,  cut in pieces
1.5 C grated parmesan
1.5 C whole milk
1 pound fettucini

Spray bottom of crockpot with nonstick spray.  Place chicken in one layer in pot.  Sprinkle chicken with salt,  pepper,  paprika.  Top with mushrooms. In saucepan,  stir remaining ingredients together,  except pasta.  Stir often, heating through, then pour over chicken.  Cook low 6-8 hrs or high 4 -5 hrs. You can add broccoli if desired,  2 hrs before serving.  Serve over hot fettucini.