Our expert says:
If your ECG and blood tests are normal and the pain is sometimes on the other side as well, it is unlikely to be heart related. It sounds to me as if it could be muscle related (inflammation) and could be due to the muscle spasms in the back with irritation of the nerves that curl round your body. Breast cancer is usually painless. If you have any palpable nodules in the breast, you should have this checked out. Going for physiotherapy may help a lot for your symptoms. You are probably a bit anxious about this as well, so it may help to take something like Biral 2 three times a day ( if you need something stronger you will have to get a prescription)
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