I'm spitting blood mixed with spit. It started was 2 days back when I had a weird taste in my mouth. so as I spit, I noticed the blood mixed with the saliva... i spit two three times and it goes clear... it doesn't come all the time... even if i try to spit from the very back of my throat, in 2 days i have noticed it two times in a day at random intervals of time like 1st day 4 hours and another day 7 hours. I am so much tense due to this, is it a symptom of something big, do i really need to worry about it? i couldn't even sleep well due to this thought. Also note i don't have any cough and cold and yes i do smoke 1 cigarette a day average