question about mets to lungs and congestive heart failure?

[Alice]

Hi,
I haven't posted for a while but have just been reading.
Last year I had to stop Herceptin due to drop in echo. i had symptoms such as shortness of breath, a feeling of having a heavy chest.
Since stopping Herceptin these symptoms have subsided. I also have a history of palpatations going way back. I was diagnosed last year also with lung nodules although I had no symptoms from them and my onc said it could probably be scar tissue.
Just recently I have been having similar shortness of breath and heavy feeling in the chest along with kind of an aching similar to heartburn. I was wondering what the symptoms of lung mets was and could the nodules be mets and not scar tissue?
I know most of you are going to recommend a scan and I know that at some point I will have to go in for one. The dye they use is so hard on my kidney that I avoid them when I can. Any info will be of great help.
Thanks, Alice