Today i'm having more productive cough due to the pulmonary fibrosis which was caused by the lung radiation. can you help me in getting this under control without a hospital stay?

Cannot answer: Without having you under my care & knowing your case this is impossible to answer. Recommend calling your puonologist or seek attention at an urgent care.

Call your doctor: Radiation induced pneumonitis is usually associated with a nagging non productive cough, i suggest you call your doctor. You want to make sure there is no infection etc. Some times there are treated as outpatient depending on severity. I suggest call you medical or radiation oncologist.

Call your doctor: If this is really purely due to the radiation pneumonitis, Prednisone may help (as outpatient). You would want to be sure there is no concomitant infection or any other problem. Your doctor should be able to help you with this.