well I'm sure the cause of such, the blood + cough could be caused by any number of things. the cigs merely complicate things - if not now - further on down the road.
Everyone reacts differently - this could be the smokes or it could totally not. They're likely making you wait because they're busy, the dr. hasn't looked at the xrays yet, they haven't looked through your file...anything. It's hard not to worry, of course, but don't let it consume you. Freaking out won't solve any problems and it'll just make you feel worse. My thoughts are with you though!!