unlikely to be cause for alarm, but should investigate
nevertheless. is it more likely that the blood is from your lungs
or is it from your throat ( trachea, pharynx, larynx, back of your
throat etc? ) and phlegm is what colour how thick ?
got any problems breathing, feeling out of breath, etc? x ray is
unlikely to show anything unless your condition is very severe, in
which case you should be showing some symptoms, etc. severe
breathlessness, bad cough, thick phlegm, probably yellow or green,
etc. hope you`re fine though .. got worries better get health
service to refer you to nuh or something.
and stop smoking.