Yesterday, I think I overworked myself and my heart gave me a punch and then I got sweaty and clammy for a bit. After that I was just breathless the rest of the evening (may or may not be from anxiety). I slept it off, had sleep paralysis, back to sleep. Been a little sluggish today. I’m in bed again shivering (cold weather) and having a burning feeling in my body like it’s my stomach/GERD. I suffer from GERD and find it hard to differentiate my heart and stomach. What should I do?