I am a 19 year old female. I have been diagnosed with heart palpitations and peripheral artery disease. I also have bipolar disorder and anxiety issues. I have had a few occasions, estimated 4 times before, of experiencing odd chest pains out of the normal for me. It feels as if something is stabbing into my heart upward from the bottom. The pain is only on the left side. I also have a dull pain that moves through out my left arm. It happened again today, but unlike the other times, a stiffness stayed in my left arm for about an hour even after the pain stopped. For a short few minutes I even had pain in the joint of my wrist, very distinct from the rest of the stiffness. I was wondering if you could tell me your professional opinion about the matter as to what you think this could mean. I appreciate you taking the time to read this.