I have been dealing with COPD over 15 years. I’m in the end stage. I’m on oxygen, breathing treatments and a vent. Meds. I can still do some things just at my pace. What I am having trouble with my breathing is—-I feel like my lungs are in a vice grip. Or sometimes when I breath it is like I have been sobbing all day (I didn’t) and my left lung that is the weakest acts like it has a mind of it’s own. Any suggestions. Thank you