I am a 16 year old female, sometimes I get sharp stabbing pain in my chest, it seems to be my left breast but feels deeper. I can be doing nothing and all of a sudden it happens. It takes my breath away and I can't talk or anything when it happens (it last about 10 seconds)... Lately I have also been getting "throbbing" sharp pains. Whay could this be? Is it worth going to a doctor for? I've had it for over a year at least.