Growth of submandibular gland

Personal details:
Name: Vikram Kumar
Age: 30
Sex: Male
Weight:59 kg
Height: 165 cm
Email ID: ***@****
Ph No: [phone]

History:
I dicovered a submandibular gland growth beneth my lower jaw in the month of Dec 2007.
I consulted doctors and they advised for FNAC test of the gland and a positive result of gland TB was found.
The doctor suggested me following medicines:
R-cinex(Refampicine)
Pyza(Pyrazinamide)
Mycobutol(Ethambutol)

I am consuming these medicine for two and half months. After about a peiod of one month from starting medicines two abcesses
appeared on my left an right soulders respectively. Both the growths had to be drained as advised by the doctors.
Again after comsuming the medicines for two months new gland developed near the previous gland on left jaw. This growth is lesser in comparision to the previous one.
The older glands are subsiding very slowly but the new secondary growth are a matter of concern.

My question :
1. Should I go in for biopsy as suggested by a few doctors?
2. Should I continue the same medicine?
3. Is the medicine prescribed to me not responding?