It's my 22 day and in all 18 days of isolation I never had any symptoms and my oxygen was always 98-99 But from last 2 days I felt a slight pain in ribs and chest But oxygen was 98-99 And today I checked 3 times for 1 minute 1.) 20-30 seconds it was 93 and then 30 seconds on 96 2.) 95 for most part and ended with 98 3.) 99 all along 4.) Started from 90 and ended In 97 . Why am I seeing so much flactuations ? Am I gonna get critical ??