My mom has had this swollen node on her neck for about 4 months now. It didnt hurt or anything at first, but it started to get bigger. After running through a bunch of tests like FNAC, turns out its a TB gland. We've been on TB meds for like 3 months now, but she's started feeling pain and theres pus building up inside the node. It hasn't gone down at all. What should we do?