So when did everyone's pulmonologist decide it was time for supplemental oxygen? Since October my o2 level drops very easily and sometimes simply while at rest. It went down to 88 tonight making tacos and that low sitting on the couch at times. This is all new time me and ocurring more and more often again since October. My o2 never used to drop even during or after rigorously exercise, so this is all new and scary to me. Can't imagine what it's dropping down to during sleep. Anyways any feedback appreciated, thank you