Within the last week or so, I've been getting sharp pains within my left arm. This usually happens when I bend it a certain way or put pressure on it. In addition I've also been getting a "heavy" feeling on my left side of my chest where the heart is located. It's not painful, and it's not hard to breathe but I know this can't be good right? I recently had this "heavy" feeling about a few minutes ago, and is why I am creating this question. I tried to feel my heart beat during this instance and it was low, or I just put my hand in the wrong spot. I do have Pectus excavatum, and I am wondering if this is the reason why I'm having these "discomforts"? I haven't had this feeling in all my life. Comments and details are much appreciated, Thank you!