For a while now I've been having a lot of trouble based around my heart. I have this constant dull ache on the left side of my chest and it feels heavy. Throughout the day I get random sharp pains in the centre on my chest and on the left side below and above my breast and at the side. I'm worried that it's a build up to a heart attack! I get a lot of palpatations and "fluttery" feelings in the left of my chest. I've had ECGs and all but one were okay. I was told at the hospital a couple weeks ago that I have an irregular pulse?! My BP today is 103/68, I don't usually check my BP and I don't know if this is ok or not?!

I'm really scared! :(