Hi, I have well managed COPD, however the past couple of weeks, I have been having discomfort across my back along the bra line when doing anything physical. Oxygen level could be anywere from 80 to 94 % saturation. Sometimes my pulse also goes up when this is happening, last week stayed over 110 bpm for extended periods even when resting. also my blood pressure is usually 120/80, but occasionally will rise to 133/90. Does this sound like something related to my breathing issues or possibly heart?