I had fevers and throat infections, a little back pain on and off in the first 6 months of last year. As prescribed by my doc, I had my ASO titre tested and it was nearly 300. After that, as prescribed, I started taking penidure injection(penicilin) once a month. My fevers and throat irritations were gone so I stopped taking the same after 6 months. But recently I feel shortness of breath sometimes and back pain again. Plus some itching/white small rash in some part of my legs. I told my doc and he said to continue the injection now thrice a month and an ECG. My ECG says sinus bradycardia Can you please suggest?