Chest Pains with Anxiety or Panic Disorder?

Sometimes it feels as though my heart is thumping, or i feel like it drops and this weird warm sensation comes over me and i'll suddenly very aware of how my heart is beating, it feels like a slow pounding. For years, i have experienced sharp, severe, usually brief but sometimes lingering pains mostly in my upper left side of my chest, just left of center. I can be doing nothing at all, just sitting at work, driving home, at the bank, grocery shopping and snap, i'm grabing my chest because it feels like something just poked or stabbed me . anyone with me will ask if i'm ok and i always say yes i'm fine, but it doesn't feel like i am. the pain happens so suddenly that my reaction is to reach for it. generally it will either happen a couple of times a few minutes apart or kind of linger almost burning or hot pain that lasts for several minutes and seems to become worse if I inhale or exhale more than a very shallow breaths which makes me feel dizzy.