My sister is 22 years old and she has been experiencing a recurring chest pain for over a month now. The pain becomes unbearable whenever she sings, talks for long or even get exposed to a cold environment. She says the pain feels like a drag on her chest muscles. She consulted a doctor earlier, who prescribed drugs for acid reflux (which she used). But the pain seems not to subside. What can we do for her to be able to sing again without pains.