I KEEP getting these two pulse-like pains in my left side right under my breast. They are sharp, and dont last long. I have seen a cardiologist and am currently wearing a 30-day ECG monitor. I'm just plain scared, and I know that doesn't help my anxiety. The pains are often followed by a wave of adrenaline but that seems to depend on my level of fear at the moment. It's not the same every time. but the little twinges are always the same.