Pulmonary Embolism Support Group
By far the most common form of pulmonary embolism is a thromboembolism, which occurs when a blood clot, generally a venous thrombus, becomes dislodged from its site of formation and embolizes to the arterial blood supply of one of the lungs. Symptoms may include difficulty breathing, pain during breathing, and more rarely circulatory instability and death.
Try to be patient! Even now I can't do much -- grocery shopping does me in. But my lungs are healing and I no longer need the O2.
Keep talking to your doctor and hopefully you will be off the oxygen soon!
(my pulse ox was also low 80s all the time without oxygen... now it's in the high 90s without)