How can I tell if I'm having a heart attack? Some precise symtoms please? I m scheduled to have heart cath done on the 21st of May. 3 years ago I had two stents put in and have felt fairly good til now only having to take a nitro every once in a while. Today I had very severe heart pain radiating to jaw. I took 1 nitro pill every 5 minutes for 15 minutes. Total of 3. The pain in chest and jaw finally left completely. The only pain that I had was a bad headache and that was from the nitro. The headace finally subsided and I felt fine for 4 hours. My husband checks my blood pressure and heart rate and pressures are normal and heartrate is about 101. Now I m getting a severe headache and only a tiny discomfort in my chest (on a scale of 1-10 I d say chest pain is 2 and headache pain is 10). Can a severe headache be a heart problem sign? The Dr s said I did not have a heart attack in 2004 Any reasonable advice will be appreciated. I had to go by ambulance in 2004 and I hated all the fuss etc. but will go that way if it s necessary.