I've been in therapy for a while now and I thought I might share something useful that I realized with ny doctor.
When i feel an anxiety attack coming over, I start talking to it as if it's a real person. I do it with confidence,  as if I would speak to a bully.
These are a few examples of rhe things I say:
- Alright, come get me
- I've dealt with you before and I made through it, I can do it again
- You've had too much power on my life until now, now I'm the one in charge
- I'm not your slave anymore 
- So what if you come? It's not like I haven't dealt with you before
- Come if you want to, I know you will be gone and I will be fine
I change it everytime, but the meaning stays the same. It really helps for me, I hope it can do the same for you. Let me know if you try it ❤