HI James,

If your getteing more anxious while your trying to breathe its probably because your taking in to much oxygen, to much oxygen will excite your brain instead of relaxing it. im not sure if you suffer from panic attacks or if its generalised anxiety but my symptoms were exactly like yours only i used to have severe anxiety attacks and developed agorophobia because of it, the only thing that stopped them was The Linden Method, check it out, maybe it can help you too, it seriously changed my life. Good luck and hope you feel better soon