L.H.
Hi B.~
I didn't have this while pregnant but I have been to the emergency room several times because of pain that I thought was cardiac related. I have problems with an irregular heart beat and to be completely honest it scares me when I start having "odd" feelings and sensations.
The last doctor I saw in the ER told me something that I had not been told by others. He said that cardiac pain doesn't happen for seconds. I have pain under my left breast too, sometimes followed by light headed feeling. Anyway, he said that if I had chest pain lasting 15 minutes or longer it was an issue. He never made me feel bad for coming in, but was trying to help me recognize what true cardiac issues are. Every ER I've been to (4) would run tests, finding nothing and I would feel like a crazy person. Basically he told me if the pain lasted 15 minutes or longer or if I had trouble breathing along with chest pain to never ignore that. He was more concerned about a blood clot than heart issues because I was diagnosed with antiphospholipid syndrome when I was pregnant (blood clotting issue). He reinforced that if I was concerned to come in that it's always better to be checked out. If they were unable to see anything abnormal while you were hooked up to all the machines, that's a good thing even though it's frustrating to not be able to determine a cause for the pain you're feeling :)
I don't blame you for contacting your regular doctor and chiropractor. It may be the way the baby is situated and is causing distress in your body. Either way I hope you figure out what's going on.
Blessings!
L.