Asking for advice

25, male, 280lbs

For about a week now I’ve been experiencing an extreme awareness of my heart beating. Definitely feels like palpitations but not constant. I’ve also had the worst migraine and my job has not been fun due to pressure in my sternum area and shortness of breath.

I went to the ER last Wednesday and they said it wasn’t cardiac related after doing an Echocardiogram, blood work, and chest X-ray. My symptoms didn’t go away so I scared myself into going back to a different ER on Saturday and they told me the same thing even though my symptoms aren’t going away.

Not really sure what to do now. I’m still dizzy, have a migraine, have chest pressure, face pressure, throat pressure, and can feel my heart beating. My chest also feels hollow sometimes.

I do struggle with anxiety but never had these symptoms before.

What do I do now? Could this be GERD?