I've been having these Covid symptoms since this morning and I've already done an RT PCR test. After talking to a doctor on Practo, I started on some meds. My Spo2 levels seem to fluctuate between 93 and 97 on my left index finger, but they read 97-99 on my right index. Is it normal for the oxygen levels to be different on each finger? What's the ideal range I should be looking for? And at what point should I be worried? My fever is currently at 101F.