I'm worried because it feels like I'm not breathing well enough. I have to take a really deep breath every 10 seconds or so, and it's messing with my sleep. This has been going on for about 4 years now. I did see a pulmonologist and had a PFT test done, which came out fine, but I'm still having issues. I've tried different medications, including Deriphyllin, with no success. Any advice on what to do next?