Hi Casey,
I've only recently posted on here as well. I am 24 and am experiencing a lot of anxiety as well with the same symptoms as you - feeling like I can't breathe, feeling like I am going to choke, tightness in chest and headaches. Have you been having panic attacks of just feeling these feelings all of the time? I've experienced panic attacks where these sensations become more intense, but I also experience them throughout the day on a daily basis as well.
I went to a GP and they referred me to see a psychologist. I was doubtful the psychologist would be able to help but it has helped me a lot, I've only had four sessions so far. Make sure you find a psychologist who works for you. I went to one who I found useless and that was a bit disheartening, so I went back to my GP, and they suggested a different psychologist who has turned out to be really good. Try and seek help before it gets worse , I'm definitely glad I did.
Hope this helps.
