question: My heart rate is normally 95 - 100 bpm. Lately it has been running around 65 to 85 bpm. I have had severe acid reflux. In fact all I have to do is burp or lay down and stomach contents, be it acid or food, come up into my mouth. Tonight around 4 am, I woke up and its hard to breath. I keep getting acid coming up into my mouth and my heart rate is around 65 bpm. Even though I'm scared it is not really increasing. I dont know if its related but my knee is shooting pain.