Peace belongs to you. When you have the Holy Spirit in you, He comes fully loaded. Everything that is His is yours. It’s totally cool. But you have to receive it and keep it. Think of it like receiving a birthday present. Until you unwrap it and use it, it doesn’t benefit you.
The enemy also knows of your gifts in the Spirit. He will work tirelessly to rob you of your peace, joy, love, etc. Don’t let him. When stress starts to creep into your life, claim your peace. Be active about it, because the enemy is active in trying to rob you. Rebuke stress. Tell God that you are claiming His peace. Release it into your life.
You may have to do this over and over again until the enemy gets the point that you’re not going to give in. It will be awesome to go through the situation in peace instead of stress. You will function with calm instead of fear. You’ll be able to hear the Holy Spirit advising you when you’re not stressed out.
If you claim your peace and it doesn’t seem to be working, do it again, and again. It’s yours. Don’t be robbed. It’s a precious and amazing gift, so hold on to it.