I Woke At 5.30 With A Kind Off Pain /

I woke at 5.30 with a kind off pain / strong cramp under my breast area across my chest, I had a feeling that this was going to escalate (I have had this before a few times and it can get worse to the point where my breathing gets difficult and I need to walk around briskly taking short breaths usually passes in around 45 mins) anyway I also have a 'jagging pain in my throat like a broken bottle jaging up and down' this morning and the last time this happened I took two puffs of my husbands GTN spray and this seemed to 'clear things' i dont feel fine but I do feel much better just a very dull headachy feeling. I am sure its possibly some kind of panick attack thing its just that I woke up with it this morning