Better check w/ a cardiologist.
I went to a doctor for chest pains when I was 49 y/o.
The doctor gave me anti-acid medicine.
That same week I had a heart attack. I had heart problems. Ended up w/ tripple by-pass heart surgury.
Feeling bad for that long, I would predict more than an anxiety attack.
I had an anxiety attack last week. it lasted about 20 minutes, as i was in a full room of people at the doctors office w8ing room.
I get real hot and start to sweat.
i get real nervous & restless. I can't breathe normal and fell a slight pressure to my chest.
I may shake a little also, but this goes away when I change my enviorment.
I shook it off, when I left the w8ing room.

Hope it's nothing that serious for you.