Lymphnode TB. The right treatment?

Hi, asking on behalf of a relative. She has been diagnosed with lymphnode TB post HR CT scan & her ATT treatment has started since the last 2 months. Her pulmonary TB tests have all been negative whenever done. She has a lot of cough even after been on medication for 2 months now with no improvement. Also vomitted blood twice & routinely started vomitting. Just want to know is this normal during ATT treatment? Her xray, chest, lungs everything is normal. But no improvement in cough at all. Should we also get pneumonia test done? Read on internet that sometimes the exact disease is Scrofula which is difficult to diagnose. Looking for some advice here. Recently xray shows some markings too which the Doctors are saying as normal. We are very confused if we are getting the right treatment?