Firstly this is NORMAL, accept it. I dont know how long I struggled to accept it. Everyone is anxious, some more than others, because of either human nature or the way they are from the beginning or due to some life changing events.
Secondly I cant stress the importance of breathing exercises enough. Anytime you feel anxiety coming on(and you will eventually start to recognize it with some physical or mental symptoms) do the 4..7..8 breathing exercise
-- Exhale completely through your mouth, making a whoosh sound.
-- Close your mouth and inhale quietly through your nose to a mental count of four.
-- Hold your breath for a count of seven.
-- Exhale completely through your mouth, making a whoosh sound to a count of eight.
--This is one breath. Now inhale again and repeat the cycle three more times for a total of four breaths. TRUST ME ON THIS. THIS IS THE HACK YOU ARE LOOKING FOR
Thirdly be mindful of your thoughts, step away every time you are anxious and see it like you were someone else advicing you, what would you say to someone else who was going through this?
Fourth - Be active! Physically. Gym, Run outdoors!
I was slightly iffy on Swimming, because although it helps physically, I always felt slightly more anxious underwater because it left me alone with my thoughts initially. But then eventually once I controlled my anxiety enough, and learned to be more mindfulness I thought it was great too!
This is how I hack anxiety and in my opinion is more than enough.