Having a really hard day today

Today is not a good day at all.

I woke up at 5am an hour before my alarm was to go off and usually I can just go back to sleep but I started feeling like my breathing was really shallow and my heart rate was slowing so I stayed awake that entire hour fighting the urge to sleep thinking I wouldnt wake up again.

Fast forward to now currently four hours later and I am gripped with the very real feeling that my time is coming to an end and I will succomb to a heart attack at some point today I am terrified right now and to make things worse I am at work and feel like this will be the place I take my final breath. I have texted my wife over 30 times telling her I love her and always will just so I know she knows I have called my mom and dad just to say hi and I love you aswell as my two siblings just incase. I dont know what to do should I go to the hospital and tell them "i feel like i am dying" im desperate for this feeling to stop but its not.

Oh my gosh that's horrible hearing this from someone else:( I go through the same thing. I wake up every morning thinking its my last day and that is justa horrible way to live. I've been to the emergency room 6 times already for that as well. What I do to make things a little better is I'll look at the time. Yupp...as soon as my "feeling of dying" starts I'll look at the time. And later on I'll look at it again and say "hey, it's been 8 hours of this heart attack and I'm not on the floor." kinda eases my mind and makes me see both the reality side and the anxiety side. Just know that you are not going to die, it's all your mind playing tricks on you. If you want, try lorazepam, it's an anxiety medication. You can take it twice a day as needed. It really does help calm you down, fast acting too! I hope you feel better soon!