I did. The
shortness of breath started already in the second week
of treatment, so I don't think it is solely an anemia issue. The chest pains came later, around week six. I was a little worried for a while, but after a few weeks they went away. During these weeks my haemoglobin levels did go down, but not below 11. Try to rest and take it easy, and get checked as others said. It's probably nothing to worry about, and normal for tx.