Hi, Sarah, and welcome. I get costochondritis. It comes and goes with me. When I'm in a flare with fibromyalgia, the costo usually will kick in. All the muscles around my ribe cage, back, and chest wall hurts. If I press lightly on the breast bone, it is very tender. Taking deep breaths can be very uncomfortable but I highly suggest doing it anyway. It helps stretch those muscles and stop them from the tenseness. Most doctors prescribe ibuprofen to help with the discomfort. I use that and it does help.
Hot showers, Bed Buddy or rice bags that you heat in the microwave give off moist heat. Moist heat feels wonderful on those muscles. Also gentle stretching exercises help, too. You can find a link to them in the Fibro 101 thread...the second thread on this forum. They are done sitting down but they help stretch the muscles and keep them more flexible.
I'm glad you did see the doctor and have heart problems ruled out. I did too. But, I don't understand what you meant when you said your heart hurt. I don't have that feeling. It's just my whole diaphram that hurts. Sometimes it's just my rib cage and back that hurt. It varies with me.
I hope this has helped you some. Let us know how you are doing. We really do care!
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Fibromyalgia, Crohn's Disease, Ostomy, Diabetes, Autoimmune Inner Ear Disease, Osteoporosis
God does not give us a spirit of fear, but of power and of love and of a sound mind. 2 Timothy 1:7