Anxiety or something else?

hey guys. I'm 20 years old and last month I got my first panic attack. Ive always been normal in terms of health and me being somewhat active and never had any issue like this before. When I got the panic attack I was convinced I was dying so I was rushed to the ER just for them to do an EKG, bloodwork, and tell me it's most likely anxiety which is the usual way of them saying they don't really know what it is. Every single day since last month l've been getting new symptoms and I don't even feel normal anymore. My body is always tingling everywhere, l have heartburn almost everyday, my jaw is tense at times, chest pains, stabbing sensations all around my body, shortness of breath at times, heart tremors, twitching all over my body and there's many more. It's weird to say that I now have all of these now and it all started with one panic attack.

Yesterday was new years and I told the ems I was having symptoms of a heart attack and they took me to the hospital straight away and as soon as I step foot in the ambulance my heart was beating the fastest it's ever beat and it felt like some sort of pressure but they told me to breathe and I got through it. Fast forward I had done 2 more EKG's one where my heart was beating fast and the other when it was beating slow and I was seen by a doctor who told me the first ekg I had a month ago was "abnormal" but the recent 2 l just had were better and normal, she also stated that my heart isn't the issue but still recommended I go to a cardiologist for a checkup and I was evaluated.

Now I still feel the symptom's and I have to wait a month for a visit and I don't even feel like my body can wait that long. Google makes it seem like every sensation in your body will result in you dying, no one else has said they felt what im feeling and I can't even get a proper diagnosis because im sure the doctors don't even know what it is.

This is my first time using Reddit & I don't know if this will reach anyone but if anyone can help me understand what it is I have or possibly have it would be really appreciated. I don't feel like im in danger but my heart and body say different. I just want to feel normal again.