sharp pain in my chest usually shorten my breath?

I think you need to go back and get this checked out, ask the doctor if you should see either a neurologist or a lung specialist. It's hard to say what the source of your problem is and it may take a couple of doctors to figure it out (they don't know everything, after all), but what your describing seems important. I think you need to pursue this, even if your doctor doesn't seem to think it's anything.

Make sure to write down all your symptoms, when you started experiencing them, how often this happens, and how severe each one is. Keep a diary and write down when it happens, how long it lasts, how you feel before and after, what you're doing at the time, and if anything seems to make it better or worse. This all might be important, so take this all to the doctor, along with any questions you have. Be insistent, if you have to, about how severe the pain is and how worried you are about it. Sometimes doctors can be dismissive, but remember that you are paying them and they are supposed to be there to help you, so push if you have to. And before you leave, make sure there is a plan in place for a next step, ie. a test, another doctor to see, a medication, something. Don't just let it be a wait-and-see or a "you're fine."

Best of luck to you. Let us know how it goes.