I have been diagnosed with costochronditis-pain in breast bone, that has gone into ribs, left arm, back shoulder blades over about three weeks. Have felt like im having a heart attack with it. Feel very anxious about it, blood pressure and pulse all have been checked, again today by chemist and are within normal range. Left arm is sore from Shoulder down to hand, more so when I raise it. Feel quite anxious about it and feel my heart racing although I don t think it is according to chemist and doctor last week. Do you think I should get it rechecked or is this normal symptoms for this condition?