It sounds like you are not accustomed to feeling calm, so it is not yet comforting to you. It may have to do with adrenaline rush and and anxiety associated with stress. The calm is not providing the surge of dopamine?

There are times when a good, warm feeling of well being washes over me and it feels soooo good to me. I am able to feel it, love it, crave it, appreciate it as it’s so fleeting.