Hi, 26F I'm feeling a little breathless at night and by sitting down it's becoming more bad as if there's a pressure on the stomach. I checked the oximeter by applying my right index finger and the oxygen levels are varying between: Spo2 -> 96-98 PR BPM - 110 -115 Could you please advise if this is concerning. I had this issue before also last month. I had a ECG for this and blood test(CBC count, Thyroid,) and Urine Test but report was normal. I also have PCOD.