Yes the other doctors are advising right.
The first line drugs along with Streptomycin injection
has to be taken for 3 months and second line should continue for 5 more months. Please notify your problem to the nearest District TB centre as well. It is a notifiable disease
now and you get free drugs from them.
Some good pain killers can keep your pain at bay and you can continue to lead normal life without affecting your occupation which is crucial to actively pursue the treatment till the end. Do not interrupt therapy as it can lead to resistance.
Let me know if I can assist you further.