Turn on your Instant Pot and select the 'Saute' mode on high. Add olive oil.
While your Instant Pot warms, toss shrimp in jerk seasoning until coated evenly. Place shrimp into Instant Pot and saute for 2-3 minutes on each side until shrimp are slightly pink in color.
Once shrimp are slightly pink in color, remove shrimp from Instant Pot with tongs and place them aside in a large bowl.
Add all peppers. Saute until slightly softened, about 3 minutes.
Add garlic. Continue to saute for an additional 2 minutes.
Add heavy cream, cream cheese, 1/3 cup chicken broth, and remaining Jerk seasoning and stir so all ingredients in the Pot are mixed together well. Saute until slightly thickened, about 10 minutes. Once the sauce is close to reaching its desired thickness, add Parmesan cheese and continue to cook on low heat. Stir until well combined. NOTE: do not clean out the pot. You will want all the jerk goodness to cook into the sauce.
Once the sauce has reached your desired thickness, carefully add to a large bowl with shrimp and set aside.
Select the 'Cancel' function to reset the Instant Pot cooking function. Select 'Pressure Cook' on high.
Add pasta shells and chicken broth. Stir until mixed well. Pressure cook on high for 3 minutes. NOTE: we like our pasta very slighly al dente. If you like yours more soft, you may want to cook for 4 minutes.
Once the timer beeps, quick release all pressure. Carefully remove the lid.
Add shrimp, peppers and sauce to the pasta and mix until all ingredients are well combined.
Serve hot and enjoy!