I think that you should stick with the dose that your doctor recommends. You don’t want the yeast to become resistant. Also, I would try hot baths and showers, or maybe even sticking your head with a towel over a pot of boiling water. I think getting some steam into your lungs might help. Also, and I don’t know about the chemicals in it but metholyptus ointment has always helped me when my chest gets tight. It is stinky, but it might help you breathe easier.
Definitely go with something that will support your liver, that will help die-off.