Twinner - I have not had costochondritis, but I was wondering if maybe your doctor could set you up to see a physical therapist...or maybe you could to get a massage and ask them to work on your back and rib areas.
As for heart disease, typically, women have different symptoms than men do. It could be chest pain, shortness of breath, jaw tightening, arm pain, heartburn symptoms, it is just to wide an array for anyone to tell without doing an EKG or echo.
I would advocate seeing a physical therapist before having injections, but that is just my opinion. I worked for a doctor once who didn't like doing injections or draining things because it is too easy to introduce infection. Actually, in his words, I believe it was "if you go poking around places with a needle enough times you're bound to cause problems."
cervical fusion 2006, with great result
L4-5 surgery with cages, plates, and screws in 2005, I have continued pain
MEDS: Fentanyl patch, Norco, Celexa, trazodone, and Parafon Forte
To handle yourself, use your head...to handle others, use your heart
I'm going to smile like nothing is wrong, act like everything is perfect, and pretend its not hurting me.