Cook the fettuccine according to package instructions until al dente.
In a large skillet, heat olive oil over medium heat.
Add the sliced chicken and season with salt, pepper, and jerk seasoning.
Stir in the garlic, onion, and bell pepper, cooking until softened.
Add the shrimp and cook until they turn pink and opaque.
Pour in the heavy cream and bring to a gentle simmer.
Mix in the grated Parmesan cheese until melted and smooth.
Combine the cooked fettuccine with the sauce, tossing to coat.
Serve hot, garnished with chopped parsley.