is it cancer?

[pather]

hi,am a 19 year old guy and since last 3 years approx i've been having  some symptoms of diseases which might be refferred to as sinusitis.However,am not certain about it.Initially, i.e 3 years back i was having frequent nose bleeding during my sleep [ which was hard to stop] lasting for some weeks ,then it stopped  till the next year and so on.Moreover, i've had frequent headache [ resembling skull inflammation] and over the years, i've suspected a nasty smell in my nose and everymorning,i find blood in my mucus[ clots rather]. Besides,i often have part of my face ,i.e cheek /eye region like inflamated[ pain,swell]. Another typical symptom is that with the begining of these, i started having blurred eyesight which the optician analysed as myopy but i was really shocked by the rapid detetioration of my eyesight within such a shot time lap.Consequently,there's another symptom [ even am not certain its one],i've got the left nostril quite blocked[ i.e breathing in oftens involve the right nostril and the left nostril partially only]...and its continuous even i try and unblock it,in vain.Thus i would like to know if all these symptoms might reveal a particular disease or ultimately a cancer?