I'm a 16 year old female, and I have had this reoccuring problem for a few years.
A few months ago, I had a certain type of palpitation thay occured just about every week; I forgot what it was called, but my mother described it to me as "when your heart pumps too hard, and has to push more blood through."? It would be one big THUMP, and then a tiny one, and I could feel my blood rushing in my chest. It was very uncomfortable.
It's stopped, but now I'm concerned about another problem. This happens mostly when I'm eating, or just sitting down and relaxing. It hasn't happened in a few months, until a couple nights ago.
It feels like a sharp stabbing pain just underneath my left breast, or maybe even behind it, and it hurts like hell. When I hold my breath, it feels like a small painful heartbeat. When I start breathing again, it feels like once I fully take in a deep breath, someone has shoved a knife underneath my breast. The longest it's stayed has been a couple minutes, and the shortest was maybe thirty seconds. The pain just increases the more I breathe. Sometimes, I'll try to feel my heartbeat under my breast, and most of the time, it's faster and quieter.
I haven't brought it up to any of my parents in fear of getting checked out just to the result that "nothing" is wrong there, and they've wasted their money. (I also faint when I get my blood taken, so I would faint for nothing as well)
My mother has a history of heart problems, as does her father, especially with his arteries. My father's mother has high blood pressure, and I'm not sure if his father has any heart problems.
I've looked this up, but I wanted some advice before I go and try to get checked out.