advice on lung mets please

[fullofbeans]

I have the following symptoms:
-shorteness of breath for few days now
-Spitting yellow stuff for around 2.5 weeks
-Dry Cough which seems to have gotten better
-Broken voice which comes and goes
-I can feel my sternum
-No fever

At first I did not worry thought it was a bronchitis type of thing because I did not know that coughing ect was a potential symptoms of mets. But after I started to get breath shortness I started to look up on net and the above symptoms are really not a good sign and I am now officially completely freaked out .

The only thing that keep me sane is that my broken voice and cough seems to have either gotten better or varied and I would think that it is a good sign (it is, isn't it??????). But the shortness of breath is now making me really wonder.

I called my hospital today and the doc said that I should go and see my GP?????????????, got angry with her, but she said they were too busy at the mo and that I should take a course of antibiotic first to see if it resolves itself. So went to see the GP and he said I should get imaging (D'ha..) because there is no infection.

As anyone had a broken voice with lung mets and was it getting worse or could it come and go and same question about cough was is getting worse and worse or varying?