Been out running for a week now slowly upping the pace and distance until I can run a 5k in <30min without stopping to walk. Anyway even though I'm in poor CV health I'm not pushing it too hard, but I'm having a really hard time breathing after the first mile or so. I have to take really shallow breaths to keep the air moving and if I take a deeper "belly" breath I feel like I'm not getting enough air. Also it's extremely hard to take in more than a shallow breath... Only way I can think to describe this is when you blow air into a balloon the first little bit that fills the volume of the empty balloon is pretty easy, but to start expanding it you need to back it up with some pressure... That's kind of what it feels like, I have to really try hard to fill my lungs past the normal volume. Anyway, it ends up with me being really short of breath and getting really bad side stitches after about 1.5 miles. Thoughts? I have access to both ephedrine and albuterol, would either of these help me?