Heart hurts physically - what's wrong?

it constantly feels similar to someone is gripping it and letting it go. it started 2 years ago while i be working out, but it stopped. it comes back occasionally. but it started again concluding week and hasn't stopped and i'm not even working out anymore. and when i checked it out with the doctor, he said i should freshly stretch before i work out but i don't even jump to the gym anymore. has anyone ever feel like this or know what this is? i'm 19 and i don't smoke, so i don't know where on earth to startHeart hurts physically - what's wrong?
may be costeochondritis, Tietze's syndrome - read up on it.
murmur/?
Get a stress test and don't agree to your doctor try and talk you out of it. No one your age should be have this problem. It's not common surrounded by your age group so your doctor will try and convince you to not bother but do NOT take "no" for an answer.