Heartburn SO BAD feels like I'm dying

I can hardly breathe it feels like someone is squeezing my chest and it feels like a heart attack omg this is how I end...😭😭 It's been lasting for hours I just want it to go away and nothing helps. Was like this last night too. It's never been this bad EVER! I've only gotten it once before this where is it coming from!! 34 weeks.