So Whenever I run I experience a few things, I've talked to some other people, and It's normal, but I fear that it's a bit more severe in my case. First off I get a kind of slime in my mouth and throat. It's so thick that I fear it'll clog my throat, and has threatened to on more than one occasion, so I have to spit every 10 seconds or so because it comes back that fast. Secondly is the blood taste, I've also heard this is normal, but it worries me cause it is so strong, i feel that any second I'm gonna spit blood, but I never have. I also can't seem to fill my lungs, it's like blowing into a balloon or something. Plus my heart is in severe pain, it is pumping so hard too that i can see my chest move. My vision fades until everything is dark, and what little i cn see is indistinguishable, like I'm about to pass out, but I don't. There's also the accompanying headache that threatens to rip my skull open, I have to sit down from this alone sometimes.