It seems as though there were some small technical problems with the forum last night. Sorry if you lost your post.
The symptoms you are describing sound a lot like an anxiety disorder. Without treatment the anxiety can get worse and worse until it feels like you are constantly anxious.
I have similar feelings, though since I've been receiving counselling it is no longer constant, it comes and goes.
Have you spoken to your doctor about how you are feeling?
You could also try some mindfulness exercises. They really help me when I have trouble breathing. It allows me to keep moving forward until the anxiety passes.
kind thoughts Jess