I just ran for not even 1/4 of a mile and on my way back to my house, I got really lightheaded and thought I was going to pass out. Not only that, but my stomach is upset (feels like I'm going to puke, but not), I started shaking real bad, and it feels like I can't breathe and it hurts (and I start coughing), is this normal? does it mean I pushed it too hard?
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