Hello & Welcome to Just Answer,
a) Since when are you feeling more tired and exhausted?
b) How is your sputum/ phlegm? Has it changed colours/ has it increased in amount?
c) Any fever/ cold/ flu recently?
d) Any blue tinge over fingernails?
e) What is the present stress/ anxiety level say on a scale of one to ten?
f) Any other symptom?
g) Any other medical issues/ significant history?
Thanks. Shall be waiting for your reply.
Thanks for the additional details. Having gone through your description it seems that you may be requiring a thorough check by your doctor and maybe the element of depression may be affecting you and aggravating the present condition. Oxygen therapy is generally recommended when the PaO2 falls below 55 mm Hg.
Please check in with your doctor to get yourself checked up thoroughly and get appropriate treatment/ review of treatment for the COPD as well as for associated depression as it would help.
I hope that this helps. Best wishes. Please feel free to enquire if you have any remaining concerns/ doubts, as it shall be a privilege and a pleasure to try and help as much as I can.