Phleghm has Blood

Hi,

I have been having sinusitis since almost 8 years , I am a  non-smoker , non-drinker .  

I  usually cough out some phlegm in the morning.I will have  blockage in the nose if  I  eat curd /yogurt.

I recently moved to minneapolis. Below is what I  experienced in the last 2 days

A couple of days last week  and Monday -  6 Dec 2010 , Tuesday - 7 Dec 2010,  I  had yogurt
Monday  morning 5 Dec 2010  , My nostrils were  blocked fully , I  could clear my nose .
On Tuesday Morning 6 Dec 2010 .  after I  woke up ,  I coughed and got a reddish phelgm.
On Wednessday  Morning 7 Dec 2010 ,  after I  woke up ,  I coughed and I could see  atleast 2 Tspoons of phlegm with blood .

Now  I am afriad as to what it could be.

Thanks  In Advance for answers / suggestions

Regards