Present Tense Affirmations 
I am calm 
I am able to let go of panic
I have a serene life
I am a relaxed person
I am in control
I am safe and secure
I breathe easily and naturally
I am able to mentally detach from panic attacks
I have confidence
I am free from panic attacks

Future Tense Affirmations 
I will eliminate panic attacks 
I will stay calm under pressure
I will stay in control
I will remind myself that I am safe
I will be okay
I will control my breathing
I will maintain focus and control
I am feeling more relaxed
I will focus on my breathing
I will overcome panic feelings

Natural Affirmations
Handling pressure is easy for me
Staying calm feels natural
Feeling safe is easy
Others see me as relaxed and calm
My life is calm
Taking deep breaths helps me relax
I can easily let go of a panic attack
Controlling my breathing comes naturally
Everything is okay in my life.

My breathing is controlled