Hi Emma,
Chest pain with lupus can be a few things. First that comes to mind is Pleurisy, or inflammation of the lining of the lungs. The pain can be brutal. Treatment for pleurisy is high doses of prednisone (cortisone). The other is something called Costochondritis - involves pain in the rib cage which does wrap around to the front of your chest. This is not damaging to the body in any way. Just massively annoying! I've had both of these symptoms on occassion....
I'd call your rheumy and tell them what you're experiencing. If it's pleurisy, it needs treatment. Does the pain get worse when you lay on your back, or when you take deep breaths?
Either way, tell your doctor and get it checked out. It's probably not heart related, but better to be safe.
When you're researching information about lupus, make sure it's current and from a reputable place. There are a lot of crap sites out there that will only scare you, not give you the right information. Your rheumy has a responsibility to make sure you know as much as possible about lupus too. Get them to sit down with you and go over everything, in terms you understand. This can be a scary disease to have, but if you're knowledgeable and have a good understanding of what to expect and how to treat symptoms, you can live a happier life. lupus is not a death sentence. MOst people live long, normal life spans, but have a few hiccups along the way!!
Blessings,
Ginny