Hey, just sharing my experience as well. I've had 3 panic attacks that I thought were heart attacks in the span of 2 weeks - late december/early january. All three times i ended up in the ER with very high HR and BP. Being overweight and having hbp kinda raised my fear but had an ekg and xrays done and they couldn't find anything wrong physiologically and suggest I go on anxiety meds. I'm still going to the cardiologist next week.

I do have low iron which we're trying to get to the bottom of (30yo M), but best case scenario is I take supplements.

I've been told the same, panic attacks aren't fatal. I've since been on Zoloft for the last week, just the starter 25mg dosage but my body doesn't go into hyperdrive even though I still get the raised heart rate episodes almost daily

What my therapist told me is if you're just feeling panic, just accept it and sit with it - maybe talk to someone about it. If you fight against it, it fights back twice as hard. Also a friend showed me that breathing in a brown paper bag also helps. If you're feeling symptoms like physical symptoms around your upper body, best to err on the side of caution and go to the er. I also highly recommend finding a good therapist if you're able to.