Just curious has anyone had high heart rate and low oxygen saturation? Recently I've been feeling real faint and out of breathe so I check my heart and spo2 on my phone health app and it's usually 121 heart rate and spo2 can range from 94% to 88% sometimes. It use to be a random thing like once a week since halfway through my pregnancy but now it's been daily and all day these past 3 days. I'm currently 36+3. I told my doc when it first happened in my pregnancy and she said to just watch until heart rate gets up to 130. I have an appt next Tuesday and will tell her then just wondering if anyone else is experiencing it.