I don't think that any oil is going to be helpful for your condition. I am not a doctor, but I am familiar with the condition as one of my family members had it. My understanding is that its incurable, and that the symptoms are shortness of breath.
Cannabis is usually helpful for alleviating conditions such as pain, inflammation (CBD), anxiety, insomnia etc. I personally don't how it would be helpful for Pulmonary Fibrosis.
Perhaps one of our doctors would take a different view.
Best of luck with your condition.