This is the second time this has happened. I inject, apsparate, no blood, and inject. After the injection, I feel the urge to cough, nothing violent. Just feels like when you take a deep breath on a bitter cold morning. I only cough a couple times, it passes within a minute and I feel fine. I don't think I am injecting into a vein, because I hear you feel like you are about to die. So what's the deal? Is it psychological, or am I injecting close to a vein?