Tracey is right about the association of the lungs with grief...also in TCM the organs are related in pairs and the lungs and the colon are associated. Cleansing and strengthening the bowel will help to heal the lungs...along with deep breathing and releasing emotions.
The drugs you were taking would have added to your toxin load and depleted your immune system, too. Since the Antibiotics resulted in thrush you may have a problem with systemic candida as well...contributing to sinus problems, cough, etc., etc. Do some research on candida and watch closely how you respond to the Master Cleanse...if candida is a problem it may become worse because the maple syrup (and any sugar) feeds the yeast.