I am a 28 yr old female with no known health problems. I started working out this past week doing a lot of upper body stuff. Today I was doing wall ball squats where you throw a 10 lb medicine ball at the wall, catch it, and do a squat & repeat. After awhile I started getting a pain in the center of my chest about 3 inches down from my collarbone. I told my coach and she said to keep going. I did but was slowing way down because everytime I would catch it, it would hurt/stab (and not like I was sore from working out). Finally after awhile I started to become short of breathe and had to stop altogether because I couldn't breathe. This isn't the first time it has happened in the last few years & I have seen a doctor who was of no help.
For added information I am a hair stylist and have my arms up most of the day. I also have silicone gel implants that I got about 3 years ago. I have no idea if there is a connection. Also once in awhile I take a prescription called provigil for Narcolepsy. I don't take it often though because it is a pretty mild case. Please help!