Inhomogeneous opacity is seen in the underlying lung in left lower zone

Hi,
Recently I got my Chest-X-Ray done to check on my self intrest.
I have received the following report from X-ray
Left sided pleural effusion is present with loculation
Inhomogeneous opacity is seen in the underlying lung in left loer zone.


Please advise me what does it mean...?
Is there anything serious... is happening inside my lungs...? Is this cancer or something...? I am really worried....
I dont have any Cough, lack of appettie .. i am doing good... except that when I inhale deep breath I feel little pain in my left side near by lungs.

Although I will be going to consult a near by doctor..... I would be grateful... if someone could help me to understand the exact condition....of my body....
Thanks
D.N.Raj