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Hello from JustAnswer.
I am sorry that you are having so many problems?
Which antibiotics have been prescribed?
Have you had any evaluation beyond physical examination?
Could you attach pictures of the problem areas?
I had asked for some further information and have not heard back.
By a large margin, the most common cause of enlarged lymph nodes are as a response to an infection. If there is evidence of infection, then it makes sense to first treat the infection and see if the lymph node improves.
From the perspective of the itching, it can be related to inflammation of the skin, including from an allergic reaction. It also can be due to excessive dryness of the skin, and anything that causes dryness. However, it also would be appropriate to perform blood tests to certain systemic conditions that can cause itching, including tests of liver and kidney function.