Gt, do you have a high temperature?
You may have started with the flu/cold and it's gone straight to your chest and given you an infection, which includes your ear.
When you see the doctor, ask him if you could possibly have an infection and whilst you are there get him to fill you out a script for antibiotics just in case it becomes worse, even if he doesn't think you do have an infection it is good to have the script on hand so you can start taking them without having delays in setting up another appointment. I know they are hesitant in prescribing them but it can make a lot of difference if you can take them sooner rather than later so be firm in asking for the script just in case. Tell him you will only take them if necessary and get his advise on when you should do so.
Also ask him if an anti histamine might help.
The above advise is excellent, we also add Vicks to the steam water, it is much more effective than a hot shower.
If your breathing gets too difficult, go to emergency, quick treatment will help protect your lungs in the long term.